* 



180 proceedings: philosophical society 



be discontinued. Other minor changes looking to the improvement 

 of the piibhcation will also be made. 



Dr. Carlos E. Porter, of Santiago, Chile, and Mr. Robert M, 

 FouTS, of Washington, D. C, were elected to membership. 



The regular program was as follows: 



C. L. Marlatt: Notes on the work of the Federal Horticultural Board. 

 Mr. Marlatt gave a very comprehensive account of the organization, 

 purposes, and scope of the services of the Board. 



In discussing Mr. Marlatt's remarks, Dr. L. 0. Howard gave a 

 very interesting account of the events and causes which led to the 

 passage of the Plant Quarantine Act. 



Carl Heinrick: On the Lepidopterous Genus Apostega and its larval 

 affinities. The author illustrated his remarks with a number of charts 

 and drawings. This communication drew forth considerable discus- 

 sion, participated in by Messrs. McIndoo, Pierce, Rohwer, Baker, 

 BoviNG, Craighead, and Hyslop. 



Under the head of short notes: 



Dr. Howard announced the recent death of an early member of 

 the Society, Mr. Chas. R. Dodge. Mr. Schwarz also gave a few rem- 

 iniscences of Mr. Dodge. 



Mr. Snyder called attention to a recent article entitled Origin of 

 castes in termites by Dr. C. B. Thompson, of Wellesley College, pubhshed 

 in the Journal of Morphology. Mr. Snyder spoke very highly of the 

 paper, as did also Messrs. Baker and Howard. 



Mr. Snodgrass expressed his pleasure at the evident interest mani- 

 fested and progress being made in the study of insect anatomy. Messrs. 

 Howard, Caudell, and Craighead gave additional remarks along the 

 same line. 



Dr. T. J. Headley, of New Jersey, responded to the president's in- 

 vitation to address the Society by giving some interesting reminiscences 

 from his experiences. 



Mr. J. G. Sanders, of Harrisburg, Pennsylvania, responding to a 

 similar invitation, gave an interesting account of some of his experiences 

 since leaving the Bureau of Entomology to go to Wisconsin and later 

 to Pennsylvania. He gave an especially interesting account of some 

 recent researches in Pennsylvania on the life history of the Angoumois 

 grain moth. 



A. B. Gahan, Recording Secretary. 



PHILOSOPHICAL SOCIETY OF WASHINGTON 



The 799th meeting was held at the Cosmos Club, January 19, 1918, 

 with President Burgess in the chair. There were 45 persons present. 



Mr. E. T. Wherry presented a paper on Certain relations between 

 optical properties and crystal form, and their hearing on the question of 

 "crystal molecules" in organic compounds. The refractive indices of 

 several simple organic compounds have been determined by the im- 

 mersion method, and their values substituted in the Lorentz formula 



