THE MID-WINTER MEETINGS AT NEW YORK. 



The Convocation Week meetings held in New York City, De- 

 cember 27, 1906, to January 2, 1907, under the auspices of 

 the American Association for the Advancement of Science were of 

 unusual importance to all departments of science. The meeting 

 is believed to have been the largest gathering of scientific investi- 

 gators which has ever assembled in America, and undoubtedly 

 was one of the most important in its influence on the course of 

 research in this country. One of the most significant and encour- 

 aging features was the realization of a more cordial and effective 

 cooperation among the various technical societies represented, in 

 the interest of a broadening of scientific culture. Societies cover- 

 ing the same field as a rule combined their programs throughout; 

 in other cases joint discussions of special topics were held under 

 the auspices of the several societies concerned. The number of 

 papers presented bearing on neurology and animal behavior was 

 large, and we are able to print in this issue of the Journal abstracts 

 of most of these contributions. 



The Association of American Anatomists had a very full program, including 

 a number of interesting neurological demonstrations. Among the papers read 

 were the following.^ 



Experiments in Transplanting Limbs and their Bearing upon the Problem of 

 the Development of Nerves. By Ross G. Harrison, Anatomical Laboratory, 

 Johns Hopkins University. 



Braus's^ experiments were repeated in slightly different manner upon tadposel 

 of Rana sylvatica and Bufo lentiginosus, but with results which show that his 

 conclusions are not of general validity. The mode of procedure was as follows: 

 The left hind limb bud, taken from a normal tapdole in a stage when the absorption 

 of the yolk was about complete, was implanted into the left side of another indi- 

 vidual of the same age and species; and similarly there was transplanted to the 

 right side the right hind limb bud, taken from a larva of the same age, from which, 

 however, the medullary cord had been removed shortly after closing over, and 

 which in consequence had developed without nerves. In most cases, owing to a 



^ Taken from the Proceedings of the Association as prepared for the American Journal of Anatomy. 

 ^ H. Braus, Verhandlungen d. Anatom. Gesellschaft, i8 Versammlung in Jena, 1904; Anaiomischer 

 Anzeiger, Bd. 26, 1905. 



