The sheep dog says to the farmer, “Here are your 20 sheep.”
The farmer says, “but I only have 17 sheep.”
“I know,” says the sheep dog, “I rounded them up.”
Giovanni AmiciBorn 25 Mar 1786; died 10 Apr 1868 at age 82.Giovanni Battista Amici was an Italian physicist, microscopist, astronomer and optical instrument designer who is best known for his invention of the achromatic lens. He also introduced the Amici-Bertrand lens, a lens for the inspection of an objective's rear focal plane. The lens system he designed for a new type of microscope in 1837 improved the magnification, capable of up to 6000 times. In 1840, he also introduced an immersion system for microscopes; the lowermost lens was immersed in a drop of oil to reduce improve clarity. He improved the design of mirrors used in reflecting telescopes. As a biologist, he investigated the sexual function of flowers, in particular he clarified the mechanism of the pollination of orchids.«[DSD gives death year 1868. EB gives death year 1863.] |
