504. Miscellaneous Intelligence. 



Gaseous current. General displacement of the total mass of 

 the mixed gases across the pores of the envelope under the influ- 

 ence of the difference of total pressure which exists between the- 

 interior and the exterior. G. l. g. 



11. Bibliotheca Zoologica, II. — This valuable and exhaustive 

 work, under the editorship of Dr. O. Taschenberg, giving the 

 titles of works and articles on Zoology which appeared between 

 1861-1880, has reached its 10th Lieferung. This includes the 

 last of the Mollusca and beginning of the Vertebrates, covering 

 signatures 361 to 400, or pp. 2929 to 3248. 



III. Miscellaneous Scientific Intelligence. 



]. National Academy of Sciences. — At the meeting of the 

 National Academy held in Baltimore, Nov. 1 to 4, 1892, the fol- 

 lowing papers were presented : 



G. K. Gilbert: The Evolution of the Moon. 



T. C Mendenhall: On the Observations for Latitude at Rockville. Md. On 

 the Latitude Observations at Honolulu. The Use of Planes and Knife-edges in 

 Pendulums. 



Thomas B. Osborne : Crystallized Vegetable Proteids. Proteids of the Flax- 

 seed. 



H. A. Rowland : A Spectroscopic Analysis of the Rare Earths. A Table of 

 Standard Wave-lengths. On the Motion of a Sphere in a viscous Fluid. 



G. H. Williams : Volcanic Rocks of South Mountain in Pennsylvania and 

 Maryland. 



Ira Remsen : On Some Curious Double Halides. Study of the Action of Light 

 on acids in Solutions containing a Salt of Uranium. 



C. Barus: On Isothermals and Isometrics of Viscosity. 



W. K. Brooks: Significance of the Follicle of Salpa. Biological Relations of 

 the oldest Fossils. 



E. D. Cope : On the Vertebrate Fauna of the Blanco Epoch. 



S. G. Chandler: On the Motion of the Earth's Pole. 



C. S. Hastings: Recent Improvements in Astronomical Telescope. 



George E. Hale: Exhibition of Photographs illustrating new methods and 

 results in Solar Physics. 



George E. Squier and Frank A. Wolff, Jr. : Some effects of Magnetism on 

 Chemical Action. 



Volume V of the Memoirs of the Academy, which has just 

 appeared, is a large quarto of about 600 pages with many plates. 

 The following are the papers it contains : On energy and vision 

 by S. P. Langley ; Contributions to Meteorology by Elias Loomis ; 

 Report of studies of atmospheric Electricity by T. C. Mendenhall; 

 Embryology and metamorphosis of the Macroura by W. K. 

 Brooks and F. H. Herrick ; Application of interference methods 

 to astronomical measurements by A. A. Michelson. 



