SCIENCE— ADVERTISEMENTS 



The Philippine Journal of 

 Science 



Published by the Bureau of Science of 



the Government of the Philippine 



Islands 



A Monthly Periodical Devoted to the Scientific 

 and Commercial Intereets of the Trepics 



The Journal is now being issued as a monthly; 

 the former sections are discontinued. The Jan- 

 uary, 1919, number begins Volume XIV. Sub- 

 scription price, |5.00 per year. 



A list of the publications of the Philippine 

 Bureau of Science iShd a sample copy of the 

 Philippine Journal of Science -will be sent upon 

 request. 



Subscriptions and orders for publications 

 should be sent to 



The Business Manager, 



Philippine Journal of Science 

 Bureau of Scienca Manila, P. I, 



Publications of 

 Carnegie Institution of Washington 



The publications of the Institution now number over 400 

 volumes, the subjects including Anatomy, Archaeology, As- 

 tronomy Botany, Chemistry, Economics and Sociology, Em- 

 bryology, Experimental Evolution and Heredity, Engineering, 

 Folk-Lore, Geology, History, International Law, literature, 

 Mathematics, Medicine, Nutrition, Philology, Physics, Zoology. 

 Classified and descriptive lists will be sent postpaid on appli- 

 cation. 



281. Papers from the Department of Marine Biology of the 

 Carnegie Institution of Washington. Vol. XIII. Octavo, 

 128 pages, 19 plates, 3 figs. ^5.00. This book contains the 

 following papers, 7wt sold separately. 

 Speidel, Carl Caskey.— Gland Cells of Internal Secretion 



in the Spinal Cord of the Skates. 31 pages, 9 plates. 

 Drew, Gilman A. — The Structure and Ejaculation of the 

 Spermatophores of Octopus americana. 14 pages, 3 plates. 

 Clark, Hubert Lyman — The Distribution of the Littoral 



Echinoderms of the "West Indies 25 pages, 3 plates. 

 Harvey, E, Newton — Further Studies on the Chemistry 



of Ligat Production in Luminous Organisms. 35 pages. 

 GuDGEK, E. W —The Ovary of Felichihysfelis, the Gaff-Top- 

 sail Catfish: Its Structure and Function. 17 pages, 4 plates. 

 289. Douglass, a. E.— Climatic Cycles and Tree-Growth. A 

 Study of the Annual Rings of Trees in Relation to Climate 

 and Solar Activity. Octavo, 127 pages, 12 pis., 40 figs. :62.00. 

 291. Contributionb to the Geology and Paleontology of the 

 West Indies. Octavo, 184 pp., 53 plates. S3 50. 

 This book contains the following papers, not sold separately, 

 Vaughan, T. W. — Introduction. 4 pp. 

 Howe, Marshall A. — Fossil Calcareous Algie from the Lee- 

 ward Islands. 11 pp., 6 pis., 8 figs. 

 CusHMAN, J. A — Fossil Foraminifera from the West Indies. 



11 pp., 15 plates. 

 Canu, F., and R. S. Bassler. — Fossil Bryozoa from the 



West Indies. 30 pp., 7 plates. 

 Cooke, C. AV. — Fossil Mollusca from the Leeward Islands 



and Cuba. 54 pp., 16 plates. 

 Rathbun, Mary J. — Fossil Decapod Crustacea from the 

 West Indies. 28 pp., 9 plates. 



A,U communications should be addressed to 



CARNEGIE INSTITUTION OF WASHINGTON 

 WASHINGTON, D. C. 



Scientific Survey of Porto Rico 

 and the Virgin Islands 



Published by the New York Academy of 

 Sciences 



Vol. I, part I — History of the Survey — 

 N. L. Beitton. 

 Geological Introduction — 

 C. P. Berkey. 



Geology of the San Juan Dis- 

 trict — D. R. Semmes. 



Octavo, no pages, 4' plates, 26 text figures, 

 I geologic map. ?2.oo 



Vol. I, part 2 — Geology of the Coamo-Guay- 

 ama District — E. T. Hodge. In Press. 

 Vol. Ill, part I— Tertiary Fossils of Porto 

 Rico — C. J. Maury. In Press. 



The completed series will comprise volumes on 

 Anthropology Palaeontology 



Botany Physiography 



Geology Zoology 



All communications should be addressed to 



Recording Secretary, New York Academy of 



: Sciences 



77th Street and Central Park West 



New York City 



International qoatterly devoted to the 

 History of Science and Civilization 



Edited fay GEORGE SARTON, D.Sc. 



Carntgie Institution, Washington, D. C. 



No. 6, completing vol. ii, just issued. 

 SARTON— War and Civilization. 

 P. Ch. ray (Calcutta)— Chemical Knowl- 

 edge of the Hindus of old. 

 G. R. KAYE (Delhi)— Indian Mathematics. 

 SARTON — La Synthese [geologique de 1775 



k 1918. 

 Follow: II short Notes and 17 Book Reviews, 

 Sixth Critical Bibhography of all the publica- 

 tions relating to the History, Philosophy, and 

 Organization of Science. 



The subscription to Vol. III. (about 500 pages) 

 is open : 30 francs. The remaining copies of 

 Vols. I. and II cost respectively 50 and 30 francs. 



thosefwho believe in the New Homantsm 

 should subscribe to "ISIS " 



Publisher: WEISSENBRUCH, 

 Imprimeur du Roi 



49, rue do Poincon BRUSSELS, BELGIUM 



