SECRETARY’S REPORT Pi 
No. 4. 1947-1948 report on the 27.0074-day cycle in Washington precipitation, by 
C. G. Abbot. 2pp. (Publ. 3919.) Mar. 10, 1948. 
No. 5. Smithsonian pyrheliometry and the standard scale of solar radiation, 
by L. B. Aldrich and C. G. Abbot. 4 pp. (Publ. 3920.) Apr. 15, 1948. 
No. 6. Magnetic storms, solar radiation, and Washington temperature depar- 
tures, by C. G. Abbot. 12 pp., 2 pls., 4 figs. (Publ. 3940.) June 25, 1948. 
REPRINT: VOLUME 74 
No. 1. Smithsonian mathematical formulae and tables of elliptic functions, by 
Edwin P. Adams and Col. R. L. Hippisley. Second reprint. 314 pp. (Publ. 
2672.) Jan. 15, 1948. 
SMITHSONIAN ANNUAL REPORT 
Report for 1946.—The complete volume of the Annual Report of the 
Board of Regents for 1946 was received from the Public Printer Octo- 
ber 18, 1947: 
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, 1946. ix+440 pp., 53 pls., 24 figs. (Publ. 3871.) 
The general appendix contained the following papers (Publs. 3872- 
3888) : 
On the astronomical dating of the earth’s crust, by Harlow Shapley. 
Atomic power in the laboratory and in the stars, by Robert S. Richardson. 
Atomie energy as a human asset, by Arthur H. Compton. 
The scientific importance of X-rays, by L. Henry Garland. 
Visible patterns of sound, by Ralph K. Potter. 
Fluorine in United States water supplies—Pilot project for the Atlas of Diseases, 
by Anastasia Van Burkalow. 
The birth of Paricutin, by Jenaro Gonzalez R. and William F. Foshag. 
The natural history of whalebone whales, by N. A. Mackintosh, 
Life history of the quetzal, by Alexander F. Skutch. 
The sun and the harvest of the sea, by Waldo L. Schmitt. 
Anthropology and the melting pot, by T. D. Stewart. 
Archeology of the Philippine Islands, by Olov R. T. Janse. 
Palestinian pottery in Bible times by J. L. Kelso and J. Palin Thorley. 
The march of medicine, by M. M. Wintrobe. 
Technology and medicine, by Kurt S. Lion. 
National responsibility for research, by J. EK. Graf. 
Toward a new generation of scientists, by L. A. Hawkins. 
Report for 1947.—The Report of the Secretary, which included the 
financial report of the executive committee of the Board of Regents, 
and which will form part of the Annual Report of the Board of Re- 
gents to Congress, was issued January 9, 1948: 
Report of the Secretary of the Smithsonian Institution and financial report 
of the executive committee of the Board of Regents for the year ended June 30, 
1947. ix+169 pp.,4 pls. (Publ. 3911.) 1948. 
The Report volume for 1947, containing the general appendix, was 
in press at the close of the year. 
817369—49——11 
