Observing the Very Small.
Peering through a microscope (from the Greek micron = small and skopein = observe) opens new worlds and perspectives. We have the microscope to thank for the discovery of the smallest plants and animals, for example, the shy Petrophaga lorioti, discovered in 1976. It goes back to Loriot (or Vicco von Bülow), a German comedian who is best known for his sketches from his 1976 television series Loriot. Its popularity led to the adoption of a vast number of phrases from the series' sketches into everyday speech in Germany, among these the "yodel diploma" and the "stone louse". Since the cute little fellow 's hard to find, we probably won't be able to pin him down with our microscope. But there are all kinds of other things to discover that will fit on the specimen slide. The microscope consists of a holder and an optical (in this case a biconvex) lens. The microscope can be focused by changing the position of the lens in the holder. If a transparent film is used instead of a paper specimen slide, the object can be illuminated from underneath through the hole in the base.