From Today in Science History:
John Locke (Born 29 Aug 1632; died 28 Oct 1704). English physician who was the most important philosopher during the Age of Reason. He spent over 20 years developing the ideas he published in most significant work, Essay Concerning Human Understanding (1690) which analysed the nature of human reason, and promoted experimentation as the basis of knowledge. He established primary qualities, (ex. solidity, extension, number) as distinct from secondary qualities identified by the sense organs (ex. colour, sound). Thus the world is otherwise silent and without colour. Locke recognised that science is made possible when the primary world mechanically affects the sense organs, thereby creating ideas that faithfully represent reality. He was an acquaintance of Robert Boyle.
Darwin invited as Beagle naturalist In 1831, Charles Darwin returned home from a geology field trip in North Wales to find letters from Revd. John Henslow and George Peacock informing him that he will soon be invited on a scientific voyage of HMS Beagle. He was 22 years old, and had just graduated from Cambridge University. The offer was to be a naturalist on H.M.S. Beagle for a two year survey of South America, leaving on 25 Sep. Although he immediately accepted the offer, his father and sisters were opposed. They regarded it as an idle pursuit that would delay his expected career in the clergy. His father, however, was prepared to change his mind, but only if Darwin could find a qualified man who viewed the exploit as worthwhile. Darwin spent the next two days doing just that.
Oops, Richard made a mistake.