The effects of motion produced on the screen through the system developed by Musschenbroek were crude but progress was made. There was also further concrete evidence that the primitive urge of the first painter to re-create nature with all its life and movement was still powerful and had not been forgotten. Previously Zahn, as we have seen, mounted a series of glass slides on a circular disk which could be revolved before the lens of the projector. But there the method really only assured quick changes from one still picture to another. In the very beginning Kircher also had the disk idea and in other models of his lantern arranged the glass slides on a long panel so the successive views could be changed rapidly. Musschenbroek, working in Holland in the early part of the 18th century, achieved his effect of motion by fitting two panels of slides into the same lantern for simultaneous projection. One slide was stationary and usually depicted the background; the other was mobile and was set in motion by means of a cord. With a skilled manipulator the effects were certainly wonderful--for that period. The motion magic lantern projector was developed as a hobby by Musschenbroek, who was unaware of its importance until he had a visit in 1736 from the French scientist, or more accurately popularizer of science, Abbé Nollet (1700–1770). Abbé Nollet corresponded with scientists throughout the world and his salon in Paris was crowded each evening with French and visiting scientists and the hangers-on of the great. While in Holland, Nollet visited Musschenbroek. One evening after a pleasant dinner and much serious conversation on educational and scientific matter, the host, Musschenbroek, proposed a bit of entertainment. He may have told his distinguished French visitor, “I have a surprise for you. I will show you something that is as yet unknown in your wise Paris.” It is certain Abbé Nollet’s curiosity was stirred up and he looked forward with keen anticipation to the demonstration. He was that kind of a person--eager for any new scientific development or application. Musschenbroek’s show that evening in Holland included, according to Abbé Nollet, magic lantern views of a wind-mill whose arms revolved--wonder of wonders! Also a lady bowing as she walked along the street. And a cavalier removing his hat in courtesy. That would seem to prove that Musschenbroek, the staid scientist, in his idle moments had attempted to create the first “boy-meets-girl” motion picture.