178 A RliMARKABLE ANTICIPATION OF 



cases in which races have coiiiplctcU' changed in colour 

 after removal to a differeiU climate he explains by 

 a mixture of breed ; and points out that ' it is easy to 

 fmd examples of an oj)positc tendency, and to show 

 that the original hue has been preserved. . . .' Thus 

 he brin-'s forward the instances of the descendants of 

 b'nglish colonists in tlic West Indies and Spanish m 

 South America who ' remain as fair as their luiropean 

 ancestors', when there has been no intermarriage with 

 other races. ' That this assertion is correct, I am con- 

 vinced,' he says, ' by the result of rei)eated inquiries.' 

 In the bLast the same results are found, although the 

 migration of white races into hot climates took place 

 at far earlier dates. Thus amongst other examples he 

 mentions that of the 'white or Jerusalem jews' who 

 are believed to have mio;rated to the Malabar coast in 

 the year 490 a.d., and whose living descendants are 

 'said to resemble the European Jews in features and 

 in complexion '. 



The converse ' experiment of transplanting black races 

 into northern climates' has not been carried on for so 

 long a period, but Dr. Prichard points out that ' several 

 generations have produced little or no alteration in the 

 complexion of Negroes in the United States and in 

 other temperate climates'. It is indeed stated that 

 ' the domestic Negroes who are })rotected from tlic heat 

 of the sun by more clothing, and who pass their time in 

 sheltered houses, are of a darker complexion than the 

 slaves who labour half naked in the fields '. 



Section iii. This most significant and remarkable part 

 of the work is headed (p. 536), Lacjs of the Animal 

 Eco}ioj)iy in 7'ixa7'cl to tJic Hereditary Transmission of 

 peculiarities of Strneture'. the hnni title at the head of 

 the Images runs, Laws of Nature in Hereditary Trans- 

 missio)i. This discussion, which forestalls by more than 

 half a century the considerations and conclusions of 

 recent writers and especially of Professor Weismann, 

 is opened by the statement that physiological wTiters 

 have often incpiired ' what peculiarities of structure are 

 liable to be transmitted b)' parents to their offspring, 



