376 Scientific Intelligence. 



19th, 1921, whence she will continue the cruise begun in October, 

 1919, having an aggregate length of 62,000 nautical miles. She 

 is expected to return via the Panama Canal to Washington in 

 October of the present year (1921) . Dr. Day, in speaking of the 

 work of the Geophysical Laboratory, gives interesting details in 

 regard to the researches made into the various processes of making 

 optical glass, called for by the demands of the war. Twenty 

 papers on this subject were published during 1919; ten more 

 in 1920, and still others are in preparation. When complete, the 

 connection with this subject, as a manufacturing process, will 

 cease. Dr. Day also mentions the work done on lines developed 

 by W. H. and W. L. Bragg in locating the atoms of simple crystals 

 by electrical means. Papers on this subject, by Dr. Wyckoff of 

 the laboratory, will be found in the pages of this Journal, Novem- 

 ber, 1920, p. 317 and February, 1921, p. 138. An account is 

 also given of the investigations of the gaseous emanations in con- 

 nection with the Katmai Crater in Alaska, and other similar 

 topics. The high cost of juaterials and labor have been keenly 

 felt by the Institution, in all its lines, but its efficiency in publi- 

 cation and research has not been perceptibly impaired. 



Recent publications of the Carnegie Institution are the follow- 

 ing (continued from vol. 50, p. 473) : 



No. 212. The Echinoderm Fauna of Torres Strait: its com- 

 position and origin; by Hubert Lyman Clark. Quarto, pp. 

 viii, 223 ; 38 plates. Department of Marine Biology, Alfred G. 

 Mayor, director. 



No. 274. Contributions to Embryology. Volume XI, papers 

 49 to 55 by different authors. Quarto, pp. 170; 15 plates, 12 

 text figures. 



No. 292. Root development in the Grassland Formation. A 

 correlation of the root systems of native vegetation and crop 

 plants; by John E. AVeaver. Pp. 151; 23 plates, 39 text 

 figures. 



No. 300. Grammar and Lau language, Solomon Islands; by 

 Walter G. Ivens. Pp. 64 ; 3 plates. 



No. 301. The North American species of Drosophila; by 

 A. H. Sturtevant. Pp. iv, 150 ; 3 plates, 49 text figures. 



No. 302. Metabolism and growtli from birth to puberty; by 

 Francis G. Benedict and Fritz B. Talbot. Pp. vi, 213 ; 55 text 

 figures. 



2. Collected Fruits of Occult Teaching; by A. P. Sinnett, 

 Pp. 307. Philadelphia, 1920 (J. B. Lippincott Co.). 



Spiritualism — Its Present Day Meaning: A Symposiums- 

 edited by Huntly Carter. Pp. 287, with 6 illustrations. Phil- 

 adelphia, 1920 (J. B. Lippincott Co.). 



The attitude of mind of one, who has been trained in physical 

 science, towards the theories and reputed facts of what is known 

 somewhat vaguely as Spiritualism, obviously depends upon what 

 may be called his individual personal equation. It is probably 

 more difficult for the physical student to feel in sympathy with 



