22 REPORT ON NATIONAL MUSEUM, 1885. 



Arpil 11. — Medical Director A. L. Gilion, U. S. N.: Sanitary ignorance among high 

 and low. 

 April 18. — Mr. J. S. Diller: A trip to Mount Shasta, California. 

 Arpil 25. — Dr. D. E. Salmon : Our invisible enemies, the plagues of animal life. 

 May 2. — Prof. T. C. Mendenhall : Weighing the earth. 



The members of the joint committee in charge of the arrangement of 

 the lectures were: Lester F. Ward, William Biriiey, Eobert Fletcher, 

 Grove K. Gilbert, Theodore K Gill, Jerome H. Kidder, Otis T. Mason, 

 John W. Powell, Frederick W. True. 



(/) Meetings of societies. 



By permission of the Director of the Museum several societies have 

 held their meetings in the Museum lecture hall. During the first six 

 months of the year the following societies have availed themselves of 

 this privilege: The National Academy of Sciences, the American Fish- 

 eries Society, the Society of Naturalists of Eastern North America, the 

 Biological Society of Washington, and the Entomological Society of 

 Washington. 



A list of the papers submitted is given below. 



NATIONAL ACADEMY OF SCIENCES. 

 April 21-24. 



Dr. J. S. Billings and Dr. W. Matthews, U. S.A. — Methods of measuring the cubic 

 capacity of crania. 



S. H. Scudder. — Winged insects from a paleontological point of view. 



A. S. Packard. — The Syncafida, a hitherto undescribed group of extinct malacos- 

 tracous Crustacea ; the GampsonycMdce, an undescribed family of fossil schizopod 

 Crustacea; the Anthracahidce, a family of Carboniferous macrurous decapod Crus- 

 tacea, allied to the Eryonidce. 



Alexander Agassiz. — The coral reefs of the Sandwich Islands; the origin of the 

 fauna, and flora of the Sandwich Islands. 



T. Sterry Hunt.— The classification of natural silicates. 



Elias Loomis. — The cause of the progressive movement of areas of low pressure. 



C. B. Comstock. — The ratio of the meter to the yard. 



C. H. P. Peters. — An account of certain stars observed by Flamsteed, supposed to 

 have disappeared. 



J. E. Hilgard and A. Lindenkohl. — The submarine geology of the approaches to 

 New York. 



Theodore Gill.— The orders of fishes. 



J. W. Powell.— The organization of the tribe. 



G. W. Hill. — On certain lunar inequalities due to the action of Jupiter, and dis- 

 covered by Mr. E. Nelson. 



E. D. Cope. — The pretertiary vertebrata of Brazil ; the phylogeny of the placental 

 Mammalia. 



C. A. Young. — Some recent observations upon the rotation and surface-markings 

 of Jupiter. 



H. A. Rowland.— On the value of the ohm. 



F. A. Gentii and Gerhard von Rath. — On the vanadium minerals— vanadiuite, 

 endlichite, and descloizite— and on iodyrite, from the Sierra Grande mine, Lake Val- 

 ley, New Mexico. 



A. N. Skinner.— On the total solar eclipse of August 20, 1886. 



