ABSTRACT
Charles Darwin wrote about twenty volumes, besides eighty-two papers or articles for scientific societies and journals. Darwin’s first scientific work of any importance was his Geology of the Voyage of the Beagle. One of Darwin’s earliest geological papers was a little sketch, showing patient observation and shrewd inference, “On the Formation of Mould,” read before the Geological Society and printed as a five-page paper in the Transactions in 1840. Darwin’s greatest single work in zoology was on those curious little marine forms generally known as barnacles, an animal which stands on its head in the bottom of its shell cup and kicks its food into its mouth with its feet. Darwin felt impelled to discuss the origin of the “moral sense” in his Descent of Man because, as he said, while it had been discussed by writers of consummate ability, no one had yet approached it exclusively from the side of natural history.
