Page 104, note 2. Marcello Malpighi of Bologna (1628-1694) is considered a founder of microscopic anatomy. At the age of seventeen he studied Aristotle and the use of the microscope. Having studied medicine, he held chairs in the universities of Pisa, Messina, and for twenty-five years at Bologna. He was physician to Innocent XII. His investigations of anatomical structure and physiological processes were crowned with great success. He discovered the capillary circulation and the minute secreting structure of the various glands.

Page  326 Leucippus in the fifth century B. C. held an atomic theory, later expounded by Lucretius in his poem De Rerum Natura.

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