10 ANNUAL REPORT SMITHSONIAN INSTITUTION, 1933 



and a painted scenic background, and during the whole period of the 

 fair a large variety of live lizards is to be displayed. 



The exliibition booth contains three separate exhibits as follows: 

 Part of the apparatus used in the Division of Radiation and Organisms 

 in researches on plant growth; a light spectrum with filters to screen 

 different rays such as are used in radiation researches; a group of 

 fluorescent minerals subjected to ultraviolet light with their resultant 

 beautiful coloring. Lastly, the automatic lantern slide projector with 

 two series of 70 lantern slides, changed twice a week, reveals present- 

 day scenes in the many workrooms and laboratories of the Institution. 



GRANTS 



Blue Hill Meteorological Observatory. — A grant of $500 from the 

 Hodgkins fund was made to the Blue Hill Meteorological Observatory 

 of Harvard University for the purchase of solar radiation instruments, 

 balloons, and hydrogen for use in maldng a continuous daily record of 

 solar and sky radiation at Blue Hill Observatory. This research, in 

 charge of Dr. Charles F. Brooks, director of the observatory, was 

 undertaken in connection with the International Polar Year. 



Davis and Ellcins College. — Two researches under way in the depart- 

 ment of chemistrj^ of Davis and Elkins College were aided by a grant 

 of $100 for the purchase of equipment. Under the direction of Prof. 

 R. B. Purdum, it was proposed to investigate (1) the solubility of lead 

 sulphate in the presence of sodium sulphate and other electrolytes, 

 and (2) the solubility of benzidine sulphate and of benzidine hydro- 

 chloride in various solvents. 



Barro Colorado Island Biological Laboratory. — The Institution con- 

 tinued its annual subscription of $300 for a table at the Barro Colorado 

 Laboratory. This laboratory offers unusually favorable opportunity 

 for studies of the fauna and flora of tropical America, and its facihties 

 are used by members of the Institution's staff or associates. 



EXPLORATIONS AND FIELD WORK 



In addition to the Johnson-Smithsonian Deep-Sea Expedition 

 already described, the Institution sent out or took part in 24 expedi- 

 tions to gather specimens and data essential to the scientific investi- 

 gations in progress. Smithsonian field parties worked not only in 

 an unusually large number of States of the United States — 29 — but 

 also in Alaska, Canada, Cuba, Puerto Rico, Yucatan, Panama, 

 Ecuador, and Siam. All these expeditions are briefly described in 

 the iflustrated pamphlet entitled "Explorations and Field Work of 

 the Smithsonian Institution During 1932", Smithsonian pubhcation 

 no. 3213, but to iUustrate the aim of Smithsonian field expeditions 

 I may here mention one or two. In Alaska Dr. Ale§ HrdU6ka carried 



