DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY. DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY.
Drawing of a chick's embryo in Marcello Malpighi's On the Formation of the Chick in the egg, taken from the 1686 edition. Malpighi (1628-1694), an Italian physiologist, was professor of biology at Bologna. He was an ardent early microscopist using the instrument to view a variety of subjects, including the lungs of frogs & the wing membrane of bats. His observations revealed the finest blood vessels, later called capillaries. His illustrations were based on his observations. Number 46 shows the whole embryonic area at 2 days old.
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