1056 The American Naturalist. [December, 
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
National Academy of Sciences.—This body met at the Johns 
Hopkins University, Baltimore, Nov. 1,2, and 3. The following 
papers were read: * The Evolution of the Moon, G. K. Gilbert; *On 
the Observations for Latitude at Rockville, Md., T. C. Mendenhall; 
*On the Latitude Observations at Honolulu, T. C. Mendenhall; 
* Crystallized Vegetable Proteids, Thomas B. Osborne, introduced by 
S. W. Johnson ; * A Spectroscopic Analysis of the Rare Earths, H. A. 
Rowland; +A Table of Standard Wave-lengths, H. A. Rowland; 
On the Motion of a Sphere in a Viscous Fluid, H. A. Rowland; 
+ Volcanic Rocks of South Mountain in Pennsylvania and Maryland, 
G. H. Williams, introduced by Ira Remsen; On Some Curious Double 
Halides, Ira Remsen; + Study of the Action of Light on Acids in 
Solutions Containing a Salt of Uranium, Ira Remsen; * On Isother- 
mals and Isometries of Viscosity, C. Barus; Significance of the Folli- 
cle of Salpa, W. K. Brooks; + Biological Relations of the Oldest 
Fossils, W. K. Brooks; On the Vertebrate Fauna of the Blanco 
Epoch, E. D,Cope; On the Motion of the Earth’s Pole, S. C. Chan- 
dler; The Use of Planes and Knife-edges in Pendulums, T. C. Men- 
denhall; Recent Improvements in Astronomical Telescopes, C. S. 
Hastings; Exhibition of Photographs Illustrating New Methods and 
Results in Solar Physics, George E. Hale, introduced by C. S. Hast- 
ings; Some Effects of Magnetism on Chemical Action, George A. 
Squier and Frank A. Woff, Jr., introduced by H. A. Rowland. Ẹ : 
The President announced the deaths of members of the Academy 
since the last meeting as follows; Lewis A. Rutherford, of New York, 
died May 30, 1892, and Prof. W. P. Trowbridge died August 12, 
1892. Prof. B. A. Gould, of Cambridge, was appointed to. write a 
biographical memoir of Mr. Rutherford, and Gen. C. B. Comstock, U. 
S. A., to prepare the memoir of Prof. Trowbridge. The deaths of two 
foreign associates, C. H. C. Burmeister and A. W. Hofmann, were also 
announced, . 
_ The following are abstracts of three of the papers read: 
In Mr. G. K. Gilbert’s paper on The Evolution of the Moon, he 
said in part: “The surface of the moon, like that of the earth, 18 
diversified by plains, uplands and mountains, and these various fea- 
tures have special characters in which they differ from those of the 
* Read on November 1. 
t Read on November 2. 
{ The remaining papers were read on November 3. 
