154 ANNUAL REPORT SMITHSONIAN INSTITUTION, 195 3 



VOLUME 121 



No. 1. Geology of the San Jon site, eastern New Mexico, by Sheldon S. Judeon. 



70 pp., 5 pis., 22 figs. (Publ. 4098.) Mar. 5, 1953, ($1.15.) 

 No. 2. The birds of the Islauds of Taboga, Taboguilla, and Uravi, Panamd, by 



Alexander Wetmore. 32 pp., 3 pis. (Publ. 4099.) Dec. 2, 1952. (35 cents.) 

 No. 3. A revision of the Colombian species of Monnina, by Ram6n Ferreyra. 



59 pp., 7 figs. (Publ. 4100.) Feb. 3, 1953. (50 cents.) 

 No. 4. Structure and function of the genitalia in some American agelenid spiders, 



by Robert L. Gering. 84pp.,72flgs. (Publ. 4101.) Mar. 17, 1953. (80 cents.) 

 No. 5. Solar variation and precipitation at Albany, N .Y., by C. G. Abbot. 16 pp., 



6 figs. (Publ, 4103.) Jan. 27, 1953. (30 cents.) 

 No. 6. Sponges of the Alaskan Arctic, by M. W. de Laiibenfels. 22 pp., 12 figs. 



(Publ. 4104.) Mar. 19, 1953. (30 ceut.s.) 

 No. 7. Some Recent Arctic Foraminifera, by Alfred II. Loeblich, Jr., and Helen 



Tappan. 150 pp., 24 pis., 1 fig. (Publ. 4105.) Apr. 2, 1953. ($2.00.) 

 No. 8, Western Atlantic scorpionfishes, by Isaac Ginsburg. 103 pp., 6 figs. (Publ. 



4106.) May 28. 1953. ($1.10.) 

 No. 9. A new Devonian crinoid from western Maryland, by Arthur L. Bowsher. 



8 pp., 1 pi., 1 fig. (Publ. 4107.) Apr. 16, 1953. (20 cents.) 

 No. 10. The Tillodontla : An early Tertiary order of mammals, by C. Lewis Gazin. 



110 pp., 16 pis., 38 figs. (Publ. 4109.) June 23, 1953. ($1.50.) 

 No. 11. Geologic background of lyatayet archeologieal site. Cape Denbigh, Alaska, 



by D. M. Hopkins and J. L. Giddings, Jr. 33 pp., 4 pis., 7 figs. (Publ. 4110.) 



June 11, 1953. (50 cents.) 

 No. 13. Regarding Washington, D. C, precipitation and temperature, 1952 and 



1953, by C. G. Abbot. 7 pp., 2 figs. (Publ. 4130.) Mar. 3, 1953. (10 cents.) 



VOLUME 122 



No. 1. Long-range effects of the sun's variation on the temperature of Washington, 

 D. O. 14 pp., 5 figs. (Publ. 4131.) May 12, 1953. (25 cents.) 



No. 3. The metamorphosis of a fly's bead, by R. E. Snodgrass. 25 pp., 7 figs. 

 (Publ. 4133.) June 25. 1953. (30 cents.) 



ANNUAL REPORTS 



Refort for 1951.— The complete volume of the Annual Keport of the 

 Board of Regents for 1951 was received from the printer October 

 7, 1952: 



Annual Report of the Board of Regents of the Smithsonian Institution showing 

 the operations, expenditures, and condition of the Institution for the year ended 

 June 30, 1951. ix + 449 pp., 69 pis., 16 figs. (Publ. 4062.) 1952. 



The general appendix contained the following papers (Pubis. 4063- 

 4082) : 



Stormy weather on the sun, by Walter Orr Roberts. 



An appraisal of cloud seeding as a means of increasing precipitation, by Henry G. 



Houghton. 

 On Einstein's new theory, by Leopold Infeld. 



Some results in the field of high-pressure phy.slcs, by P. W. Bridgman. 

 Ultrasonics, by Arthur R. Laufer. 



The industrial applications of atomic energy, by M. L. Oliphant. 

 Some prospects in the field of electronics, by V. K. Zworykin. 

 The new chemical elements, by Saul Dushman. 



