10 EVOLUTION 



themselves to haye^remarkable staying power 

 in inheritance, being anything but liable to 

 swamping; and (3) that we have not, even 

 to this day, sijffin'ftnt. knowledge of what 

 T)a.nrin P ft yr sen"* tn..lm.vp..Hf)ii|it.pd. namely 



r nPTii'.fl.ni ni'.V-fYr trip Tnirmtp "*- 



It was probably a false step on 

 Darwin's part when he turned so fully away 

 from discontinuous variations. 



MODERN STUDY OF VARIATIONS. One of 

 the great steps of progress in evolution lore 

 since Darwin's day has been what we see, for 

 instance, in Dr. J. A. Allen's pioneer measure- 

 ments of American birds (1871), in Bateson's 

 "Materials for the Study of Variation" 

 (1894), and in the pages of the journal called 

 "Biometrika" the recording and registra- 

 tion of the variations that do actually occur 

 in nature. A few results may be noted. 



It has been clearly shown that Darwin-did 



supply vf raw material. "Even Darwin 

 himself," as Wallace says, "did not realize 

 how much and how universally wild species 

 vary. " Jtjias been proyfijjHint ffreat vwn- 

 tjon I's-^s fjfiQ^R-t in yrrld nfci i 



animals. The fountain of change is even 

 more copious than was dreamed of. 



Another important fact has come out 



