The law of originally greater plasticity, mentioned in the text, was first hinted by Hall, the palæontologist of New York. It is accepted and defined by Dawson, Story of the Earth and Man, 360—“A new law is coming into view: that species when first introduced have an innate power of expansion, which enables them rapidly to extend themselves to the limit of their geographical range, and also to reach the limit of their divergence into races. This limit once reached, these races run on in parallel lines until they one by one run out and disappear. According to this law the most aberrant races of men might be developed in a few centuries, after which divergence would cease, and the several lines of variation would remain permanent, at least so long as the conditions under which they originated remained.” See the similar view of Von Baer in Schmid, Theories of Darwin, 55, note. Joseph Cook: Variability is a lessening quantity; the tendency to change is greatest at the first, but, like the rate of motion of a stone thrown upward, it lessens every moment after. Ruskin, Seven Lamps, 125—“The life of a nation is usually, like the flow of a lava-stream, first bright and fierce, then languid and covered, at last advancing only by the tumbling over and over of its frozen blocks.” Renouf, Hibbert Lectures, 54—“The further back we go into antiquity, the more closely does the Egyptian type approach the European.” Rawlinson says that negroes are not represented in the Egyptian monuments before 1500 B. C. The influence of climate is very great, especially in the savage state. In May, 1891, there died in San Francisco the son of an interpreter at the Merchants’ Exchange. He was 21 years of age. Three years before his death his clear skin was his chief claim to manly beauty. He was attacked by “Addison’s disease,” a gradual darkening of the color of the surface of the body. At the time of his death his skin was as dark as that of a full-blooded negro. His name was George L. Sturtevant. Ratzel, History of Mankind, 1:9, 10—As there is only one species of man, “the reunion into one real whole of the parts which have diverged after the fashion of sports” is said to be “the unconscious ultimate aim of all the movements” which have taken place since man began his wanderings. “With Humboldt we can only hold fast to the external unity of the race.” See Sir Wm. Hunter, The Indian Empire, 223, 410; Encyc. Britannica, 12:808; 20:110; Zöckler, Urgeschichte, 109-132, and in Jahrbuch für deutsche Theologie, 8:51-71; Prichard, Researches, 5:547-552, and Nat. Hist. of Man, 2:644-656; Duke of Argyll, Primeval Man, 96-108; Smith, Unity of Human Races, 255-283; Morris, Conflict of Science and Religion, 325-385; Rawlinson, in Journ. Christ. Philosophy, April, 1883:359.