Illustration of cork wood cells by Robert Hooke from observations of cork wood under a microscope. Robert Hooke (1635-1703) was born in England and studied at Oxford University, assisting in chemistry under Robert Boyle. The illustration appeared in his book "Micrographia", which was published in 1667 and is believed to be the first major book on microscopy. The term "cells" was coined by Hooke in the publication, describing the pores observed in the cork. "Micrographia" also contributed to areas of optics, combustion, and geology.