science · 23 September 1624 · 400 years ago
In 1624, Galileo wrote a letter and sent it with one of his compound microscopes to another leading scientist of the day, his friend Federico Cesi in Rome. At the time, Galileo was living in Bellosguardo, near Florence, Italy In the letter, Galileo gave some tips on how to use it. Although he did not invent it, he had made improvements to the original design by Zaccharias and Hans Janssen. About his own observations, Galileo wrote in the letter, “I have contemplated a great many animals with infinite admiration…” Cesi worked with Francesco Stelluti and viewed the anatomic structure of bees, described in their text, Apiarium (1625), the first publication on microscopic discoveries.
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