CONTENTS 



Original Papers Page 



Physics. — A furnace temperature regulator. Howard S. Roberts 401 



Technology. — Radiators for aircraft engines. S. R. Parsons and D. R. Harper, 3d. . . .409 



Abstracts 



Geodesy 416 



Physics 417 



Geology 418 



Geochemistry 419 



Volcanology 420 



Proceedings 

 Geological Society 421 



Scientific Notes and News 428 



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The Academy has on hand a miscellaneous stock of separates of papers 

 from the Proceedings (1898-1911). By authority of the Board of Man- 

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BOTANY 



Coulter, John M. ; and Rose, J. N. A synopsis of Mexican and Central Ameri- 

 can Umbelliferae. 50pp., 11 pis $0.10 



Evans, Alexander W. Notes on Japanese Hepaticae. 26 pp., 3 pis .05 



Ferguson, Margaret C. Contributions to the knowledge of the life history of 

 Pinus with special reference to sporogenesis, the development of the gameto- 



phytes and fertilization. 202 pp., 24 pis .40 



Frye, T. C. The Polytrichaceae of western North America. 58 pp . 10 



Greene, Edward L. A study of Rhus glabra. 30 pp . 10 



HerrE, Albert W. C. T. The foliaceous and fruticose lichens of the Santa Cruz 



Peninsula, California- 73 pp 0.15 



HerrB, Albert W. C. T. The Lichen flora of the Santa Cruz Peninsula, Cali- 

 fornia. 244 pp ' . 40 



Humphrey, Harry B. Studies in the physiology and morphology of some Cali- 

 fornia Hepaticae. 50 pp., 2 pis . 10 



Botanical Papers from the Harriman Alaska Expedition 



IV. CoviLLE, Frederick V. The Tree Willows of Alaska. 12 pp., 1 pi .05 



V. Evans, Alexander W. Notes on the Hepaticae collected in Alaska. 28 



pp., 3 pis ^ 0.05 



XXIV. CoviLLE, Frederick V. The Willows of Ala.ska. 66 pp., 10 pis 0.10 



XXV. Saunders, De Alton. The Algae. 96 pp., 20 pis 0.15 



XXVI. CoviLLE, Frederick V. Harrimanella, a new genus of Heathers. 8 pp. 0.05 

 XXIX. Cardot, J., and Theiriot, I. The Mosses of Alaska. 80 pp., 1 1 pis.. . . 0.15 

 The set of 14 botanical papers 1 .50 



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