RECORDS OF MEETINGS OF 1906 295 



ently on a continuation of the same vein or dike. This one has yielded less 

 tourmaline than the former, but much more beryl, and particularly the 

 heretofore very rare pink variety. Of these, a number of fine large crystals 

 have been obtained, comparable with those lately developed from the 

 gem-tourmaline mines in San Diego County, California. 



The present specimen measures about four inches in both length and 

 diameter; it is a fine termination, of the t}'pe characteristic of this variety. 

 It has been recently shown by Ford {Am. J. Sci., Sept., 1906) that these 

 pink beryls, from whatever locality, present a peculiar type of crystalliza- 

 tion. Instead of the long hexagonal prism with flat basal termination, 

 usually seen in the green beryls of New England, the pink ones tend to a 

 strong development of pyramidal planes, especially the pyramid of the second 

 order (s), while the prismatic faces are short. It is very interesting to see 

 how perfectly this crystal, from a new locality, conforms to this statement. 

 It shows three very short and partly broken prismatic faces, and a large 

 and perfect hexagonal pyramid of the second order; the basal plane is 

 reduced to a small irregular face about one inch in its longest diameter, 

 and bears several shallow pits or depressions, of which the inclined sides 

 conform to the pyramid of the first order. Altogether, the specimen is one 

 of unusual interest. 



The Section then adjourned. 



A. W. Grabau, 



Secretary. 



SECTION OF ASTRONOMY, PHYSICS AND CHEMISTRY. 



October 15, 1906. 



The Section met at 8:15 P. M. at the American Museum of Natural 

 History, Vice-President Trowbridge presiding. 



The minutes of the previous meeting of the Section were read and ap- 

 proved. 



The Section then proceeded to the election of Sectional Officers for 1907. 

 Professor C. C. Trowbridge was elected Chairman of the Section and 

 nominated to the Council for election as Vice-President of the Academy. 



The election of Secretary was postponed to a later meeting. 



The Section then listened to brief reports of summer work by its mem- 

 bers. 



The Section then adjourned. 



Milton Franklin, 



Secretary. 



