ABOUT ART RESTORATION: Generally, artifacts and art that people want to preserve are governed by principles of conservation and restoration. Usually the museum or person owning an object wants to follow steps that will maintain the object in a condition close to its original state for as long as possible. A restoration specialist attempts to minimize the amount of intervention, use methods and materials that are appropriate and reversible, and fully documents any work done. Efforts may include cleaning and repairs, and preventative care, such as controlling the conditions such as exposure to light, humidity, and temperature.
ANOTHER PROJECTION TRICK: In the 19th century, a number of optical toys were created that also gave the illusion of motion from a rapid succession of still photos. The most well-known is the zoetrope, invented in 1834 by George Horner: A zoetrope is a cylinder with vertical slits cut into the sides. On the inner surface of the cylinder were images from a motion sequence. As the cylinder spins, the user looks through the slits at the images, producing an illusion of motion much like a movie.
The Optical Society of America contributed to the information contained in the TV portion of this report.