35 



synthetic apparatus. As to the part played by chlorophyll, the 

 various familiar possibilities remain ; if concerned in the synthesis 

 as such of carbohydrates, it presumably affects the later stages of 

 the process rather than the initial ones. 



In support of these conceptions, attention is called, among 

 others, to the following well-established facts: (i) In the majority 

 of plants, at any rate, chlorophyll itself is a product of photo- 

 synthesis formed with the aid of light by a " photosynthetic 

 substance" present in the plastid. (2) Although iron is not 

 present in chlorophyll, chlorosis follows an insufficient supply of 

 iron, and can be readily cured by the application of iron salts. 

 (3) Numerous attempts notwithstanding, it has not been possible 

 thus far to bring about to any considerable extent a synthesis of 

 carbon dioxide and water with the aid of chlorophyll separated 

 from plastids (chlorophyll solutions, films, etc.). 



Even if we view with reserve the report that salts of iron in 



the presence of light bring about in vitro a synthesis of carbon 



dioxide and water into formaldehyde, the conceptions here 



developed by Moore go far towards illuminating the interesting 



relation between iron and chlorophyll. 



W. M. 



PROCEEDINGS OF THE CLUB 



October 13, 1914 



The meeting for October 13, 1914, was held at the American 

 Museum of Natural History at 8 :i5 P.M. In the absence of other 

 officers the Secretary presided. 



This being announced as an "Experience" meeting, informal 

 reports on various subjects were in order. 



Mr. Clifford Farr reported having found what purports to be a 

 hybrid Artemisia in Ohio during the summer. 



Dr. Jean Broadhurst spoke of self pruning of several sorts of 

 trees and exhibited specimens of elm branches to illustrate this 

 phenomenon. 



Prof. T. E. Hazen gave a short account of his collecting trip 

 on Mount Washington, N. H. 



