THE PROGRESS OF SCIENCE 



515 



The Nutrition Labokatoey at Boston. 



Observatory at Albany and is now be- 

 ing extended to the southern hemi- 

 sphere in the observatory erected at 

 San Luis in the Argentine Republic, 

 where the work is under the immediate 

 charge of Professor R. H. Tucker, who 

 has been given leave of absence from 

 the Lick Observatory for this purpose. 

 The work in terrestrial magnetism 

 under Dr. L. A. Bauer includes the 

 completion of the third cruise of the 

 Galilee on the Pacific, where altogether 

 over 60,000 nautical miles have been 

 covered in regions wnere magnetic data 

 were especially needed. With the ex- 

 tensive work done on land in different 

 countries by the institution and by 

 other agencies a new set of magnetic 

 charts covering nearly one third of the 

 globe can now be constructed. A new 

 magnetic survey yacht is being built, 

 which, on its completion this summer, 

 will be sent to the north Atlantic. The 

 geophysical laboratory at Washington, 

 of which Dr. A. L. Day is director, is 

 now in efficient working order and has 

 entered on a systematic study of rock 

 formation, with excellent equipment 

 for producing such effects of tempera- 



ture, pressure, etc., as may have oc- 

 curred in the history of the earth's 

 development. 



In biology, the institution supports 

 a desert botanical laboratory in Ari- 

 zona; a station for experimental evolu- 

 tion on Long Island and a marine 

 biological laboratory in one of the 

 Tortugas Islands. With the desert 

 laboratory at Tucson as headquarters, 

 very interesting experiments are being 

 made on the effects of moisture, alti- 

 tude, etc., in plants, including a study 

 of the vegetation following the receding 

 area of the Salton Sea. Especially 

 noteworthy have been the experiments 

 of Dr. D. T. MacDougall on the pro- 

 duction of new kinds of plants by 

 subjecting the reproductive organs to 

 chemical action. Elaborate experi- 

 ments in breeding have been carried 

 forward under the direction of Dr. C. 

 B. Davenport at Cold Spring Harbor, 

 Long Island, including the crossing of 

 p^oultry, canaries, cats, sheep, goats^ 

 insects and plants, and observations on 

 human traits, which give quantitative 

 data of importance for determining the 

 laws of heredity. The station at Dry 



