Oral History Transcript — Margrethe Bohr
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Session I | Session II
Margrethe Bohr:The children had such a very happy home life with this combination of a very intelligent and wise father and a very lovable mother. She was a wonderful woman. She wasnít merely lovable, she was also very clear in thought. The home was so wonderful because of them. The whole family also meant much. The grandmother of the family Adler had a place in the country, Naerum, which they gave later as a home for children. Itís a wonderful property outside Copenhagen, Naerum Gaard.... His grandfather on the motherís side was a banker, and they bought this home there. He died rather early, and the grandmother lived there in the summer. Niels and Harald always spent their summers there playing in this wonderful garden, and all these remembrances from the family life meant so much to him all through his life. They stayed out there, and there were also cousins who came to see them and stayed with them there. One can often see his thoughts in those letters from when they were grown up. This grandmother died before I got into the family, I think it was eight years before, and then the home went right away to a childrenís home. But a relation lived next door so to speak, so we came out there. This was Hermann Trier; he was a politician, a landstingsmand, who was married to my husbandís aunt, to my mother-in-lawís sister. They had the house, so when I got to know him we also spent the summers there at first. And out in this big garden there he told me of all his childhood in Naerum.
Kuhn:How large a household was it in Copenhagen?
Margrethe Bohr:Oh, it was then large. They lived in a house that belonged to the Institute where my father-in-law was a professor. The house was in Bredgade, an old building. They had three maids and three children, and then they had an old nurse who was also so sweet, and she looked after them. And Niels and Harald were so sweet to her, and Niels helped her to sew her buttons on, and Harald played the violin while they did it, so they were such sweet little boys. The sister was the eldest.
Aage Bohr:What was her name?
Margrethe Bohr:Kirsten ... Of the three children the sister was the eldest. 100 I think she was a couple of years older — two or three.
Kuhn:Were they close to her? I mean, I know that the relation between the two brothers was very close.
Margrethe Bohr:Yes, it was close because they were so affectionate and good in that way, but of course a girl who is three years older had her own friends and so on. Then when she grew up she was always a nervous child. She was not as healthy as the two others in that way; my mother-in-law had a very difficult birth with her. In any case, she was nervous and caused, in that way, a lot of anxiety. However, she went through school and was very able. She had a very nice personality also, but her nerves gave her difficulty later in life in dealing with other people and so.
Kuhn:Was she ever married?
Margrethe Bohr:No, she was never married. No; she was very interested in teaching — that was most of what she did. She didnít do much work because she didnít feel so well always. This nerve problem had only caused her to be a little unreasonable, but suddenly after my mother-in-lawís death she turned ill. Then she died here. But, of course, through their whole childhood Harald and Niels meant so much to each other. They both admired each other. Harald was quick to tease Niels a little, but in a very lovable way. They were always very close. ... One can see it here in the letters from Manchester. And when Harald came to see Niels in Cambridge, oh, the admiration and enthusiasm. But as a school boy I only know what these two people have written. I donít know anything else about him as a school boy.
Kuhn:You spoke of Haraldís playing the violin. Did Professor Bohr also —
Margrethe Bohr:No, never, no. He was very fond of music; he liked to hear music and had a very good ear. But he did not play anything himself. To begin with, when Kramers was here, he had very great pleasure with Kramers. And for a long series of years we always had some music, which gave him great pleasure. There was Ehrenfest also, when he came. I know he also said that even if Niels wasnít musical he was very observant and could hear what was in the music. I remember once Ehrenfest had come to see us at Blegdamsvej. He was sitting and playing for me, something, I think, of Philipp Emanuel Bach. Niels was sitting and working in the next room, which was his study. Then he suddenly came in and said, ďWhat was it you played; it reminded me of a Gothic column.Ē And Ehrenfest was amused and said, ďThat was just what it was meant to remind you of.Ē
Kuhn:Was there a lot of music in the home also? Did either of his parents play?
Margrethe Bohr:No, no; none of them played; and Harald also didnít play at his home. He gave it up; he was too busy, but he was always fond of music. No, it came, as I said, from Kramers and partly Heisenberg, also. It came very, much from Ehrenfest who always played when he came here. Later there was Frisch; he was the last one really. So at that time we had music in the evening when the young people came.
Kuhn:What about other, non-scientific interests? Did he read a lot outside of the sciences?
Margrethe Bohr:Oh yes, he did. Yes, he didnít read much science. To his last days he read a lot outside of science, and very quickly could get through a book. I donít understand how he could do it. I donít know how much he read on each page.
Rosenfeld:Yes. And he was also very conscientious. I remember once, when I came to Tisvilde to work, he had just got a book from this Icelander Gunnar Gunnarsen. He told me, ďOh, I must read it through because I must thank him, and I cannot thank him if I have not read the book.Ē ďI feel like a murderer to see you here. I must finish that book; I cannot begin anything else before.Ē
Margrethe Bohr:I remember the first books he told me about when I got to know him were the Icelandic Sagas. They played an enormous role in his life. He knew them, and when we visited Iceland about ten years ago he was taken around to see things. I heard from the ambassador that Niels could tell even more about it than the scholars in Iceland could. He knew it so well, and he remembered perfectly every little thing from every saga. I think he read them from the time when he was a school boy. Those he read, and another of the first books he gave me was one by Kierkegaard, which he also read very much, but of course as a young student. But what be read as a boy I donít know; I think he read all the Indian stories, and such things. I know that he had given all of Cooperís tales to one of his friends; he read them all. Yes, all these he went through. There was Kierkegaard, Stadier Pa Livets Vej, I remember. He wasnít so deeply interested in Kierkegaardís thoughts, but he was an extreme admirer of his language, an enormous admirer of his language. He liked to read this piece of the Danish language as Kierkegaard has written it. He never went back to study Kierkegaardís thoughts; he wasnít interested in the problems which Kierkegaard put to himself.
Rosenfeld:He once told me, ďIt is such a pity to have spent so much art and so much genius in the language to express such crazy thoughts.Ē He could quote poetry; he remembered whole pieces of poetry.
Margrethe Bohr:Ibsenís poetry, yes. And he was very fond of Goethe and Schiller. Oh, he read that very much; Goethe and Schiller I learned through Niels. Especially in his later years he read the Norwegian Wildenvey. He loved that. There was nobody he liked better than Wildenvey in his last twenty years. I donít remember any English poetry. He read Carlyle for a time, but he was disappointed by it. At first be was interested in it, but then he dropped the interest. He didnít think it was really good.
Kuhn:Was he able all of his life to keep on reading this widely?
Margrethe Bohr:Yes, all of his life. Dickens he read; he loved Dickens. Shakespeare and Dickens; they were all from our early days. But he was interested in all kinds of new books that came on all kinds of subjects, archeology, for example. All kinds of subjects interested him as soon as it had something in it. Some of the last books: which we read with great interest were about Pompeii and about art. I couldnít say a single subject he wasnít interested in when the book gave something, when it gave you some real information. I donít think he read fiction.
Aage Bohr:Except for detective stories.
Margrethe Bohr:Oh, detective stories! Oh dear, all his life there was no end of that kind of thing. Oh, when we traveled to, Italy, we had a whole suitcase of books with us, especially such little books.
Rosenfeld:There was Wodehouse. He read Wodehouse when he was tired.
Aage Bohr:Everything with humor in it he enjoyed.
Margrethe Bohr:He read very much. There was the Norwegian author, Harry Fett. He was really the director for the antique museum in Oslo, but he was also a man interested in all kinds of things. He wrote about King Frederik the Great, and Japanese art, and Dutch art. Do you remember, he gave Kramers a book; Kramers was so enthusiastic about his book on Dutch art. Kramers said afterwards that he wasnít convinced that Harry Fett was quite right, but he had so many ideal that were interesting. He said (Orestel) had really made his paintings in Norway, which probably is true.
Aage Bohr:He liked books that tried to develop some new idea around the connections between things. He would often become very enthusiastic about that, and tell everybody about it.
Margrethe Bohr:In the younger days he read Thackeray. Another Englishman whom he also liked very much was Meredith, The Egoist.
Kuhn:I gather also that another thing which, at least as a young man, took a lot of his interest and attention, was sports. I hear particularly about soccer; excuse me, football.
Margrethe Bohr:Yes, yes, but that stopped; he never played football: after we were married. Never. I saw him play football once before I was engaged, but never afterwards. He played tennis in England, but not football. But my brother-in-law went on playing football. He was the brilliant one. Niels was at the goal, I think. He played as a boy very much, but grown up he didnít have any sport. Skiing, yes, and bicycling and riding on horseback a little, and walking, but not sport in the sense of games.
Aage Bohr:But in Tisvilde he would always play games like badminton; and we cut down trees of course.
Margrethe Bohr:And he played with the children and so; that he did very much, playing ball, and so on.
Kuhn:Had football been important to him in school?
Margrethe Bohr:Yes, I have once been to a football match with him before I was engaged to him. We went to watch Harald. But I never saw him play myself, I donít think. I think he stopped because then he was so busy with his dissertation. But in Cambridge he played tennis, yes.
Kuhn:When people refer to his career or to his and Haraldís careers as football players, is this a University team that they are playing on?
Aage Bohr:. There was a special club, AB, Academic Ball Club. They mostly recruited players from the students, but not exclusively. But Harald played on the National Team for many years. He was a big star of football at that time. That was different.....
Margrethe Bohr:Niels and Harald often went mountain climbing together. They were just out of school when they started, Harald and Niels, and another friend. They were in Norway and in Switzerland and in Austria and various places they went, and the nature made such a strong impression on Niels. I can see it in his letters; he was so taken up by the lights and by the trees. You can see he is really enthusiastically getting something out of it. It wakes all his nerves up.
Kuhn:Did he travel a lot, or did the family travel a lot when he was a boy?
Margrethe Bohr:The family didnít travel a lot, no. I donít remember my mother-in-law ever traveling. But Niels and Harald went skiing in Norway in the winter with an aunt who always traveled, my mother-in-lawís sister. But my mother-in-law didnít care for traveling. I donít ever remember her going out of Denmark; she must have done it sometime, but I donít remember it. But the aunt went every year to the mountains also. They went to Holmenkollen and those places, and from that he learned to love Norway. She continued this in later years also.
Aage Bohr:I think with the sports perhaps one can say that my father liked sports very much, but he was not particularly interested in the competitive aspects of sports. That was the difference, you see.
Kuhn:Youíve already said how wonderful his parents were and how close knit a family it was, but how much would he really have seen of his father when there were three servants and a nurse?
Margrethe Bohr:No, it was not in the English way; no, they had very much family life there. The father, also was much with the children — as much as he could be with his work. The nurse was not like an English nurse in that way. No, I think that it was one large family.
Kuhn:Did he ever speak of things that he had done with his father? Did his father read to the boys?
Margrethe Bohr:I donít remember that he has said that, but the mother read very much to them. When he was older then he discussed with his father scientific topics and so. The father knew from the time when he was a small boy what was in him. I know my mother-in-law used to tell me that his father saw this when Niels was only a boy because he could answer so well little questions about volume and such things. This was as a little boy of five or six years or something like that. I remember my mother-in-law told me his father always said, ďPeople will listen to him; people will come to Niels and will listen to him.Ē And then he also said of himself, but this is only after a while, ďYes,Ē he said, ďIím silver, but Niels is gold.Ē So in that way he must have occupied himself with him.
Kuhn:Because of this recognition of Professor Bohrís special characteristics did they make special provisions?
Margrethe Bohr:No, no, nothing whatsoever. They just talked of it between themselves.
Aage Bohr:That you can also see in the things that some of his schoolmates have written. Some of them considered him a very ordinary pupil.
Kuhn:What other adults did he have contact with?
Margrethe Bohr:This aunt; she also loved Niels. She was a pedagogue really; she had a school herself.
Aage Bohr:Hanna Adler was her name.
Margrethe Bohr:She had a co-educational school. So she loved these two boys, and she took them around. She was the educational one; she took them to museums, and she took them around and showed them things. She considered this her job to show them things; she did all these things with them. That was her great joy.
Kuhn:In addition to her general interest in education, were there subject matters that she was particularly interested in?
Margrethe Bohr:No. She was interested in general education and liked to show them things and take them around and so.
Aage Bohr:Of course she was interested in the general cultural development and had a great influence on the people here. She was among the pioneers of that time.
Margrethe Bohr:Her whole home was very unprejudiced and high; she was very liberal. I know friends often have told me that it was always said, ďWhere the family Adler is, there it is high to the ceiling.Ē It is something like that; I canít express it.
Kuhn:Weíve talked so much about the Adlers; could you tell me a little bit about the Bohrs?
Margrethe Bohr:Yes. The Bohrs — that was different. I donít know as much about the Bohrs. The grandfather was the headmaster of a school; ďProfessor BohrĒ he was also called at the boysí school. He was also a very good and able man, and a very clever man.
Aage Bohr:They were school teachers for several generations.
Margrethe Bohr:His great-grandfather was also a headmaster of a school in Helsinger, and his great-great-grandfather had a school in Bornholm. But they were what we call good Danish citizens; the quite exceptional human qualities, in any case, came more from the Adler family, I think. The goodness, the interest in all people, that I think is a characteristic for all the Adler family. Also the cousins had this special human interest.
Kuhn:I take it that the aunt was really something of a family leader.
Aage Bohr:Especially in her later years after my fatherís mother died.
Margrethe Bohr:There were very funny relations between her and my mother-in-law. They loved each other like Harald and Niels had done — there was the same year and a half between them. But my mother-in-law was a gentle child and Hanna was active and a more strict person and wanted to do things. There were often very funny little episodes there. I remember my motheróin-law was so sweet; she was so independent in such a gentle way. Then when Hanna got older she was deaf and telephoned many times a day, but also every evening, and wanted my mother-in-law to do so and so. She would say, ďHave you now been to see these people? Have you now done this?Ē My mother-in-law never went out to see anybody, and sometimes she said, ďYes, I have; I have done it.Ē And some time when she hadnít, she put a tea cozy on the telephone and said, ďNow, I wont be disturbed!Ē They were very witty, yes. Hanna came to see us very, very much, when we were married. She came to stay with us every summer. She was a wonderful personality. She had this school, and she was the first at this school in the morning and was the last to leave it. Then she would come to us from there. You would think she would be tired because she was getting up in the years — she was perhaps between sixty and seventy. Then she would come to us and would play, oh, with the greatest joy with the little children which we had here then. She never got tired of children.
Kuhn:She had no family of her own?
Margrethe Bohr:No, no. She wasnít married. But still you would think she would be tired. She was a little of a tyrant sometimes, but in a good way.
Kuhn:Did she take a special interest in Professor Bohrís work?
Margrethe Bohr:Well, she had taken a degree in physics herself, but even if you take a degree in physics, you canít follow such things. But she loved him, and she was proud of him, and she wanted to do all that she could for him.
Aage Bohr:Iím sure if she wanted to read of those physical questions she could understand. She certainly followed everything with him.
Kuhn:What would religious training and attitudes have been in Professor Bohrís home?
Margrethe Bohr:There was not religious training; neither of his parents was religious. I think they didnít go to church. He wrote very nicely to me once from Cambridge, and he said, ďWeíll think it is Christmas Eve,Ē and he gave a sort of a little picture of remembrances from his childhood. He said, ďI think of a little boy whose father took him by the hand and took him to the church to listen on Christmas Eve.Ē And then he said also, ďI think this father took this little boy to the church so that he shouldnít feel different from all other boys. And his father never said anything about religion to him — not anything.Ē Then they got christened later. My mother-in-law was a little weak in health, and she got suddenly worried that they should have troubles. Itís no problem now, but it was then. It could be then a little problem if perhaps you were the only one in the class who hadnít been christened, and so on. So they were christened when they were 13 or 14, or the like. I donít remember whether my husband was confirmed or not. There was a period of about a year where he took it very seriously; he got taken by it. Then it suddenly all went over. It was nothing for him. Then he went to his father, who had left him quite alone in this regard, and said to him, ďI cannot understand how I could be so taken by all this; it means nothing whatsoever to me.Ē And then his father didnít say anything; he just smiled. And then Niels says, ďAnd this smile has taught me so much which I never forgot.Ē So they never exerted any influence, but let them do what they liked. I think perhaps my sister-in-law mentioned this, and that was how I came to know of it. You know, it was often at that age — and I have experienced it myself — that one got very religious and would listen to the minister telling about confirmation. Then it all dissolved. And for me it was exactly the same; it disappeared completely.
Kuhn:How old would he probably have been?
Margrethe Bohr:14 or 15 or something like that. And since then it had no interest for him.
Rosenfeld:He told me that around 1916 he was worried with the social question which was then of course very acute.
Margrethe Bohr:Oh, yes. Also this I remember.
Rosenfeld:He said that he listened once to a sermon of some priest about the social question, and then he recognized that there was nothing at all in religion. It didnít provide any answer.
Kuhn:When you say the social question Ė-
Rosenfeld:He said, ďHow can one help the poor people? How can one identify them? How can one recognize them, go to them, and try to help them?Ē And obviously he must have listened to that sermon to see whether there was any argument giving some answer to that, and he decided that there was nothing at all — that it was only talk.
Margrethe Bohr:He took very seriously the problem of the poor people, trying to help and do something in this period of his life. I mean, he was always ready to help, but just then he took it up and went into it for a period to see what he could do himself.
Kuhn:What sort of things did he do in this period?
Margrethe Bohr:Well, I donít quite remember how it was; he went to see people and gave what little money he had. It just happened so in those years. But he was always interested and always wanted to help people who had difficulties and were in need and who were really honest. And there came so many to him sometimes; perhaps it wasnít always so, but he always liked to help.
Kuhn:I know nothing about the situation in Denmark at that time; would there have been anything special for him about his home because of the fact that his motherís family had been Jewish?
Margrethe Bohr:No, none whatever. No, none whatever.
Kuhn:There was essentially a complete integration?
Margrethe Bohr:Yes, in any case the father was the family there. That I donít think he ever has felt here.
Kuhn:Was this characteristic of Denmark in this period?
Rosenfeld:I would say it was the same in Belgium.
Margrethe Bohr:No, it wasnít; there were problems. I remember others have told me that somebody was going to marry —. Now, you see, itís a little easier when itís the father because it was a complete old Danish family the Bohrs. Itís a little more complicated if a daughter married a Jewish person. I know several cases, but I donít think my husband has ever felt it. Then the family Adler was so loved and respected and had also been here for generations.
Kuhn:Did he think of himself as a Jew, or is this sort of thinking something that never enters the picture?
Margrethe Bohr:No. He didnít think of himself as a Jew; he didnít think of himself as anything. That only came when Hitler came — this problem that if one of the parents were Jewish, then you would be in difficulty. I thought more of it; I donít know whether he thought so much of it until perhaps —. But, in any case, I was speculating a lot about what to do if they came.
Aage Bohr:There was very little connection with the Orthodox things. The whole family considered themselves really a part of the community.
Margrethe Bohr:No, they did not go to the synagogue.
Aage Bohr:No, they were not connected at all with the synagogue.
Margrethe Bohr:Except for, the aunt. They were always collecting money among the Jewish members, and she always subscribed. ... The Bohrs couldnít count as a Jewish family; it was only the pure Jewish families who were approached. She was always giving money to it. It was because of that they came to arrest her. The Germans had all the names in the Jewish community, which was terrible. The synagogue hadnít destroyed their lists. They came to her house right away, as a result of those lists which they should have burned long ago. That was ridiculous. But at that time when Hitler came, there was a complete integration here. But a generation before it was not all the families who took it like that. For example, the (Koppels). I remember his mother, who is not Jewish, told me that when she came to her father and said, ďHe is Jewish,Ē that there was a little problem.
Aage Bohr:It was in my great-grandfatherís time that the integration took place. He was a very prominent man in the economic life in Denmark. In the middle of the last century when there was the beginning of the industrialization he played quite a prominent role. Then at the same time he also took an active part in the general liberal movement of the time, and that was the time when Denmark got the constitution. And there was the war with Germany, and so on, so he was quite a prominent figure in the community.
Kuhn:This is Professor Bohrís grandfather?
Margrethe Bohr:Yes, his motherís father. You see, his motherís mother was English. And itís her father whose portrait is hanging over there. She came from London. But D.B. Adler was a great personality in the Danish community. He had so many, many ideas in starting also in this very liberal way inside the government. And then he got so ill from overwork and died.
Aage Bohr:So it was just at that time — 1840, or so — that Jewish families were completely accepted in the community. ... There is a book that tells a little about it. Thereís a book written about this Hanna Adler by various contributions that was published a few years ago for her hundredth anniversary. Itís in Danish, of course. But that tells a little about the Adler family, and in particular her father, and so on. And that ought to give a little of the background there.
Margrethe Bohr:She had a great sense of humor, this aunt Ė a very great sense of humor. She has written a wonderful diary. She went over to America when she finished her degree. She was one of the first women students here in Denmark. And when she finished her degree, she went to America; she wanted to study schools in America. There she has written a wonderful diary about conditions in America at that time.
Aage Bohr:She wrote it down as letters to her mother. Itís a very interesting picture of America. She was so impressed by many things in America — by the progressive developments in education. But then itís also interesting that she was so deeply impressed with the Negro problem in America that she writes that she almost decided to stay in America to work for the Negroes. But she felt that she had to carry through with her school project, so she came back to Denmark.
Kuhn:Was that diary published?
Aage Bohr:Only part of it is quoted in this book, but it is available.
Margrethe Bohr:But thatís written in Danish; I think Eric has it now; he has never given it back to me.
Aage Bohr:She was delayed landing because there was cholera on board the ship when she came. And then she wrote also about how all the local politics came into getting permission to land. They got into all these things; it was just like now in America with these things.
Kuhn:Were, there others besides his aunt who would have exerted perhaps particular influence, or been particularly important to Professor Bohr?
Margrethe Bohr:I think it was mostly the two aunts there; there was also the old aunt, but she died the year we were married. I think she was a great help to the whole family; I mean, she was unmarried for a long time and lived with her mother. Therefore she could be so much for the family. Then she married later this Hermann Trier, this politician. He had loved her for many years, but she couldnít decide to leave her mother. Then she married him, but I think they were only married eight years when she got cancer and died. It was just the year we were married, so we went from the wedding to the funeral. Then Nielsí mother had an uncle, Bertel Adler; he was a nice man, but he didnít play a major role in the Bohr family. He was also a banker and had his own family. They had one daughter, especially, Rigmor, who was then cousin, but she was a good deal older. She must have been several years older than Niels. But she also loved Niels; she had quite a close relation to him all through childhood. No, the uncle married into another family, (Frank). They were a little more worldly, so to speak, even if nice people. But there was not that close connection between them as there had been between my mother-in-law and her sister.
Kuhn:Did Professor Bohr ever speak of school teachers who had themselves had any particular influence on him, or whoa he particularly remembered?
Aage Bohr:No, on the contrary I remember always when we complained, with regard to our children, that the teachers are not good enough, then he would say, ďWell, one of the biggest impressions on children can be when they suddenly understand that the teacher doesnít understand the subject.Ē
Kuhn:Was it clear from very early that he was going to go into the sciences?
Margrethe Bohr:I think, yes, because of his way of concentrating, his way of taking the foundation of things. He brought problems up to the teacher where he could see that the school books had not always got it quite right. He frightened the teachers a little at first, but it was because he had this understanding of, as I call it, things in their Nature. He could concentrate so enormously.
Aage Bohr:He never considered going into philosophy? I donít know, but I donít suppose he did. He would consider that as something that goes with other things.
Margrethe Bohr:He also talked about religion, and toward the last he said to me, ďI wish I could write a book about religion.Ē That was only in the autumn, and I said, ďI wish you could.Ē He was sorry for the role the religion played. So many things which were not true were peeping through, and he thought it was not well for human beings to hold on to things which were, as nearly as one could perceive it, not true.
Kuhn:Had he felt that way about religion throughout the time you knew him?
Margrethe Bohr:Yes, yes; he did always. He was sorry for human beings; he felt that they shouldnít build on something that wasnít true.
Aage Bohr:Some people say, ďWell, you should take this symbolically in some not very clear way.Ē That he did not like. He wanted to talk in a way that was consistent and use words according to their proper meaning.
Margrethe Bohr:Yes. And he was very interested in the talks he had with Professor Johannes Pedersen, in the later years here in Carlsberg. He has translated the old scripts. And he told so interestingly about all the mistakes that have been put into what you call the Bible, and so on. He said it is completely misinterpreted. He thought it was undignified for human beings to pattern themselves after this and to build their lives on it. And as he always said, one has to give something in its stead. Therefore he always said, ďI wish I could write a book.Ē I mean, he was thinking of the schools and the education, and so on. I wish he could have written it.
Kuhn:I realize, Mrs. Bohr, I donít know how long before you were married had you known him?
Margrethe Bohr:Not so very long.
Aage Bohr:Yes, but, I mean, you were engaged for two years.
Margrethe Bohr:We were engaged for two years, yes. Oh, did you say before I married him? Yes, were engaged for two years; well, he was one year in England.
Kuhn:Then had you then actually met him for the first time?
Margrethe Bohr:He studied together with my brother at the university, and my brother told me first about him. Yes, let me think, where did I meet him the first time. I think it was at a dinner party. He was sitting on one side of me. It was at Edgar Rubinís. I think I met him for the first time there. He was sitting on one side and Edgar was on the other, but I donít think I talked with him that evening. Then I was invited to their home. I lived in the country together with my brother. There I then got to know him. That must have been in 1909, or something like that. Then he came with my brother to see us. He came to the country and spent an Easter, I think, with us. Then he was also invited to my brother-in-lawís doctor dissertation. I remember we had a party. So I met him a few times; I met him sometimes during the spring. Then he came down to my home. That summer we were engaged.
Kuhn:Was your brother greatly impressed with him from the start?
Margrethe Bohr:Yes. And I came with my brother to him, therefore.
Kuhn:Iím terribly interested, of course, in his life at the University. He spoke himself of the amount of time that the special work had taken and that this meant that he did a great deal of his studying by himself.
Margrethe Bohr:Yes. I donít think that he went to so very many lectures. I think he must have gone to Thieleís in astronomical calculation, and also to Christiansen.
Aage Bohr:Not the regular Christiansen lectures.
Margrethe Bohr:Not the regular. I think he did it himself.
Kuhn:What other subjects did he have? I take it he would have had to take the philosophy curriculum.
Aage Bohr:Yes; that was with Hoffding, of course.
Margrethe Bohr:You see, in his fatherís home these four men met. There was Vilhelm Thomsen the very famous linguist, and Professor Hoffding and Professor Christiansen and my father-in-law. And you see they met regularly in one anotherís homes for discussion. And Niels and Harald listened very much when they met in my father-in-lawís home. They were allowed to sit there and listen. That played a great role in their lives. And Christiansen was very religious, but the others were not, so there were discussions and they listened.
Kuhn:That other sorts of things would they have discussed?
Aage Bohr:Probably it was politics and scientific news.
Margrethe Bohr:Yes. But Christiansen remained religious till his last days. He was not especially dogmatic about the Christian religions. He was very interested in Buddhism also, I know. The whole family was religious.
Aage Bohr:Hoffding was a man with very broad interests and in general be was concerned with cultural development and the repercussions in social life. The same was true of my grandfather, I think.
Kuhn:Professor Bohr went to the University in 1903, I think, and got his Mastersí degree, or Magister, in 1909. Was that a typical period to spend, or was that long?
Margrethe Bohr:No, it was not very long.
Aage Bohr:Six years wasnít long. Did he take six years?
Margrethe Bohr:No, I canít understand he took six years. ... Then it must be because he did things in between. And he sent his work to Lord Rayleigh.
Kuhn:You said something to me Saturday about the manner in which Professor Bohr had always worked by dictating. You said that before he had done this with you he had done it with his mother. Do you have any notion of how far back that pattern goes with him?
Margrethe Bohr:Yes. As long as he had any independent work which he was making himself. He dictated to her his whole doctorís dissertation. In any case, until I came into it, she always did it. And my mother-in-law told me that my father-in-law always said, ďYou mustnít help Niels so much; you must let him learn to write himself.Ē And then she said, ďBut it was no good because he could not.Ē He could work in this way, and he could not any other way.
Kuhn:But there must have been school papers.
Margrethe Bohr:Oh, those he wrote himself. No, no, no those he wrote himself. It was only when he was making things that he did this. No, no the school papers he wrote himself. No, it dates only from this dissertation. When he was writing that his mother was always helping him; he couldnít write it himself.
Kuhn:Could that also perhaps have been true of the Prize essay?
Margrethe Bohr:Thatís quite possible. It was either his mother or me, or Harald sometimes a little, when he had time.
Kuhn:I take it he wrote letters?
Margrethe Bohr:Yes, he wrote his own letters, in any case, to me.
Aage Bohr:We can see that the drafts of letters to Rutherford he did himself.
Margrethe Bohr:Has he also written his own to Rutherford in those days?
Aage Bohr:Yes, those he wrote.
Margrethe Bohr:But not after Miss Schultz came; then he never wrote, I think. First of all, spelling was not his strong side, and he often wrote wrong. Then he would have to take a new paper and do it again, and so it was a lot of work for him to write. But I see there are more manuscripts from the student days, and he had taken lectures down. There were several also in that little box I found there.
Aage Bohr:I think it really interfered with thought to have to write it at the same time.
Margrethe Bohr:It was an effort for him, a great effort for him to write a letter.
Aage Bohr:He gave so much attention to the writing. You asked about the student days. Then, of course, there was a group of his own age that he had considerable contact with. And there was a discussion group, ekliptika, that is described a little bit in an article by Slomann; thatís available. He tells in a very amusing way how the discussions would go as soon as my father and Harald would get started on it. They would take over the scene completely. That is published in a little article in a newspaper. But to this group belonged William Slomann who had written this and who was later the director of the Museum of Art Industry. He was so very much interested in this side. Then, of course, there was Edgar Rubin who was the head of it and was a psychologist.
Margrethe Bohr:He was one of those Niels was closest to; he had the same outlook, and he understood Niels so well. They were also related. Edgar Rubinís mother was a cousin of my mother-in-lawís. She was also English.
Kuhn:How large a group was this in the discussion group?
Margrethe Bohr:I was going to say since it was called ekliptika, it must have been that there were just twelve. My brothers were there; one of them in any case; I think both.
Margrethe Bohr:Einor Cohn was there; Peter Skov was there also.
Aage Bohr:He has come into the family again now as a father-in-law.
Margrethe Bohr:Annís father, yes.
Aage Bohr:She is married to one of my brothers.
Margrethe Bohr:But there were all kinds of different subjects. I think Gudrun Poulsen, (Jennyís) friend, was there; I donít remember if my sister-in-law, (Jenny), was there also. But that played a great role then; that was in the student days. But I donít remember it after we were married.
Kuhn:Among this group was it, except for his brother, Rubin to whom he was closest?
Margrethe Bohr:Rubin was the one who understood him so well, yes. And he often said later, when Niels published his things about Complementarity, ďYou have spoken like that since you were 18 years old.Ē But my husband was so very close to Rubinís family; not to him only, but to the whole family. I canít say that we saw them, but he was always interested if one could do something for them; Edgarís brother was ill, and so on. He never forgot them.
Kuhn:In the relation with Harald in these years from school into the University, did they work sometimes on a problem together?
Margrethe Bohr:No, not really, no.
Aage Bohr:I donít think so.
Kuhn:Did they discuss their work?
Margrethe Bohr:Oh, very much. I donít think they discussed Haraldís work because Niels wasnít a mathematician, but they discussed Nielsí work. Always he wanted to discuss it with Harald; always he liked to hear Haraldís reaction to everything.
Aage Bohr:That he always wanted to hear, yes.
Margrethe Bohr:All kinds of things that he did later in life he discussed with Harald.
Kuhn:Did he write him often when they were apart?
Margrethe Bohr:Yes. And Herald came to see him in Cambridge, and Niels was oh, so happy to have him there.
Kuhn:How much of that correspondence do you suppose may still exist.
Aage Bohr:Yes, thatís something we have to find out about.
Margrethe Bohr:Niels hasnít written very much because he still writes to me, ďGive my love to Mother and to Harald and say Iím so sorry I havenít written; Iíll soon write, and will you tell them so.Ē So he didnít write very much to them.
Maybe there is something weíll have to ask.
Session I | Session II