Field Museum of Naturae History 



Chicago 



February 3, 1910. 



Mr. Walter Deane, 



29 Brewster Street, 



Cambridge, Massachusetts. 



My dear Mr. Deane: 



Please accept my sincere thanks for the very interesting specimen of 

 fruiting Euphorbia received from you yesterday. It is a rare and valuable 

 addition to my herbarium of the a p »<»i<&<a £^^^. 

 



I know of no published discussion of the causes of fertility or lack 

 of fertility in the species in question. 



I am very much pleased to know that you are able to contribute to this 

 herbarium further examples of your interesting collections, and the Museum 

 will thoroughly appreciate any sendings that you may decide upon. As to the 

 previous sheets of your collecting in this herbarium, I append a tabulation of 

 same which will, no doubt, be of some interest to you. You may or may not 

 know that while the herbarium of this Museum is arranged in exactly the same 

 manner as those of other institutions, yet we are able here to ascertain 

 without a moment's loss of time the exact number of specimens contained in 

 the herbarium from any definite locality or of any special collector. I 

 should be very much pleased if sometime you might visit us. 



Y/ith sincere regards, 



Curator, Department of Botany. 



ENCLOSURE. 



