66 REPORT OF NATIONAL MUSEUM, 1924 



The National Herbarium is indebted to a number of investigators 

 to whom collections in groups in which the Museum has no special- 

 ists have been sent, or who, in making studies of a revisional nature, 

 have gone over our material critically and thus increased its useful- 

 ness and scientific importance. Most of the students to whom speci- 

 mens have been sent for examination have contributed in this way 

 and it would be impracticable to detail here every transaction of 

 that nature. Only a few of the more important instances can be 

 mentioned here. Among the numerous members of the scientific 

 staff of the Department of Agriculture who have benefited the 

 herbarium, Dr. S. F. Blake and Prof. C. V. Piper, of the Bureau 

 of Plant Industry, have given particular attention to a study of 

 critical material of the Compositae and Fabaceae respectively. In 

 connection with the identification of recent large accessions of 

 specimens from the Andes of northern South America, Doctor Blake 

 has reidentified a large amount of material in the herbarium. 



RESEARCHES ELSEWHERE AIDED BY MUSEUM MATERIAL 



As usual a large amount of material has been sent out to investi- 

 gators in most of the scientific institutions of the country and to 

 many abroad for the purpose of aiding them in their studies. Others 

 have preferred to come to Washington to pursue their researches 

 in the collections here, some staying perhaps for only a day, while 

 others have spent months for the purpose. To all the Museum has 

 extended every facility at its command. Scientific workers in all 

 branches of systematic and geographic zoology and botany all over 

 the world know that they can count on the active cooperation of the 

 officers in charge of the National Collections as far as their resources 

 go, and that students who choose to come here will receive a cordial 

 welcome to examine our material which because of its richness in 

 types and large series of specimens in critical groups, takes a com- 

 manding position among the scientific institutions of the country. 

 Prof. Heiichiro Motohashi, of the Imperial College of Agriculture, 

 Tottori, Japan, during his recent visit to Washington, examined 

 the Museum's specimen of the wild Przewalski horse, as well as 

 other equine material in the Museum, in connection with his studies 

 of the horses of Japan. Dr. C. J. van der Klaauw, conservator in 

 the Zoological Laboratory of the University of Leiden, Holland, 

 spent a 'week or 10 days in the division of mammals during the 

 autumn of 1923 examining alcoholic embryos in connection with 

 his studies of the development of the ear, and considerable mate- 

 rial was sent to Leiden for further study. A. M. Baiter, Wash- 

 ington, D. C, spent several months in the same division working on 



