218 



drift and is corroborated by Prof. Shaler, in this important fact- 

 Dr. Abbott concludes that the '"' similar surface relics may also be 

 glacial in age and were dropped from melting ice-rafts during the 

 retirement and destruction of the southern limit of the ice, and 

 finally that inasmuch as it is jarobable that this early race was driven 

 southward by the ice, and returned northward, following the shrink- 

 ing of the glacier, that many of these surface-found implements 

 were made by these same people, when re-occupants of the country." 

 Mr. Grote referred to the similarity of these views with those ex- 

 pressed by him in a note to the American Naturalist, July, 18TG, 

 in a lecture entitled '' The Early Man of North America," delivered 

 January 6, 1877, and printed in the Buffalo Courier of the follow- 

 ing day, reprinted in the Popular Science Monthly for March, 1877 ; 

 and in a paper ''On the Peopling of America," read before this 

 Society, February 2, 1877, and reprinted in the American Natural- 

 ist for April, 1877. On the receipt of a copy of Mr. Grote's lecture, 

 Dr. Abbott had written him to the effect that it had given him "an 

 admirably clear idea of the whole subject." In the same letter Dr. 

 Abbott wrote : "I have of late been so much occupied with the 

 one point of finding relics in the moraines here that I have not given 

 careful attention to the subject in all its bearings." Mr. Grote re- 

 ferred to Dr. Abbott's previous views on the subject of these imple- 

 ments in his papers : '"Traces of an American Autocthon," Am. 

 Nat., June, 1876, and "Stone Age in New Jersey," and regretted 

 that Dr. Abbott had not seen fit to mention at least one source of 

 his amended views, at the present time when Mr. Grote's theory of 

 the peopling of America received such important corroboration. 

 As given in tlie American Naturalist, Mr. Grote's hypothesis with 

 regard to the Peophug of America involved the following proposi- 

 tions : 



(1.) That during the Tertiary period man had spread from Equa- 

 torial lands on the eastern hemisphere to Northern Asia, and had 

 then crossed into America from the North. 



(2.) That in at least as early as Pliocene time man had migrated 

 down the high lands adjacent to the mountianous backbone run- 

 uins: alonir the western side of the two Americas. 



