1710-1784

Swiss Naturalist

Abraham Trembley was a pioneer in experimental morphology. He is primarily remembered for his experiments on the hydra, or freshwater polyp (Chlorohydra viridissima), tiny creatures about a quarter of an inch long. Trembley discovered that the polyp could produce separate and complete new animals after it had been cut in half. His experiments were described in Memoir on the Natural History of a Species of Fresh Water, Horn-shaped Polyps (1744). Trembley also made important observations of the reproduction of algae and protozoans.

Abraham Trembley was born into a prominent family in Geneva. His most famous discoveries, however, were made while he served as a private tutor to the children of wealthy families. He later accompanied the young Duke of Richmond on his grand tour of Europe (1752-1756). In recognition of Trembley's services, the duke granted him a pension. Trembley married in 1757 and settled near...