28o SCIENCE PROGRESS. 



of the history of evolution which appears in the introduc- 

 tion to all later editions of the Oj-igin. So too would 

 my friend, Professor Osborn, have given high honour to 

 Prichard in his interesting work, From the Greeks to Dar- 

 win. It is an anomaly that such works as the Vestiges 

 should attract attention, while Prichard's keen insight, 

 sound judgment, and balanced reasoning on many aspects 

 of organic evolution should remain unknown. 



I am very far from maintaining that these most in- 

 teresting anticipations in any way diminish the credit of 

 those recent writers who have treated the same subjects in 

 greater detail and of course independently. The interest 

 evoked by Dr. Davis' discovery in the literature of evolu- 

 tion is mainly due to the work of those recent authors by 

 whom the whole subject has been brought into the light of 

 day, and the attention of every intellectual man and woman 

 has been compelled. 



The limits of space oblige me immediately to proceed, 

 after this too brief introduction, with a detailed statement of 

 Prichard's arguments and conclusions, which will be found 

 to justify, in the fullest manner, all that I have said in his 

 praise. 



It has already been said that the arguments referred to 

 are found in the Researches into the PJiysicai History of 

 Maftkind, vol. ii. (London, 2nd edition, 1826). They are 

 included in the seven sections of the first chapter of Book 

 ix (p. 525), which is entitled a "General Survey of the 

 Causes which have Produced Varieties in the Human 

 Species, with Remarks on the Origin of Nations and on 

 the Diversity of Languages ". The first chapter treats 

 " Of the Causes which have Given Rise to Varieties in the 

 Human Species". In the first section of the first chapter 

 the author admits that it is fruitless to seek for a complete 

 explanation of the causes which have produced the varieties 

 which are witnessed in the human species. " The origin 

 of the varieties in the breed is enveloped in the same 

 obscurity which still hangs over every question relating to 

 the theory of propagation." 



The opinion that the different shades of colour met 



