URL stream: microscopes
http://www.google.com/search?q=vermeer+astronomer
Who is he?
http://en.wikipedia.org/wiki/The_Astronomer_%28painting%29
“The man portrayed in this painting and The Geographer could be Anton van Leeuwenhoek.”
http://en.wikipedia.org/wiki/Anton_van_Leeuwenhoek
”Antony [1] (October 24, 1632 - August 30, 1723), full name Thonius Philips van Leeuwenhoek (pronounced ‘vahn Laywenhook’) was a Dutch tradesman and scientist from Delft, Netherlands. He is commonly known as “the Father of Microbiology”.”
“Using his handcrafted microscopes he was the first to observe and describe single celled organisms, which he originally referred to as animalcules, and which we now refer to as microorganisms. He was also the first to record microscopic observations of muscle fibers, bacteria, spermatozoa and blood flow in capillaries (small blood vessels).”
http://www.ucmp.berkeley.edu/history/leeuwenhoek.html
“It was he who discovered bacteria, free-living and parasitic microscopic protists, sperm cells, blood cells, microscopic nematodes and rotifers, and much more.”
http://en.wikipedia.org/wiki/Robert_Hooke
“In 1665 he published a book entitled Micrographia which contained a number of microscopic and telescopic observations, and some original observations in biology. Hooke coined the biological term cell, so called because his observations of plant cells reminded him of monks’ cells which were called “cellula.””
http://www.roberthooke.org.uk/
“The inventor of, amongst other things, the iris diaphragm in cameras, the universal joint used in motor vehicles, the balance wheel in a watch, the originator of the word ‘cell’ in biology, he was Surveyor of the City of London after the Great Fire of 1666, architect, experimenter, worked in astronomy - yet is known mostly for Hooke’s Law.”
http://images.google.com/images?q=micrographia
http://www.its.caltech.edu/~atomic/snowcrystals/earlyobs/earlyobs.htm
”In 1665 Robert Hooke published a large volume entitled Micrographia, containing sketches of practically everything Hooke could view with the latest invention of the day, the microscope. Included in this volume are many snow crystal drawings, which for the first time revealed the complexity and intricate symmetry of snow crystal structure.”
http://www.its.caltech.edu/~atomic/snowcrystals/photos/photos.htm
Hollow Columns
Hexagonal columns often form with conical hollow regions in their ends, and such forms are called hollow columns. These crystals are small, so you need a good magnifier to see the hollow regions.
Note how the two hollow regions are symmetrical in each column. Sometimes the ends grow over and enclose a pair of bubbles in the ice, as seen in the last picture on the right.
