SECRETARY'S REPORT 155 



The insides of metals, by Carl A. Zapffe. 



Atomic weapons against oancer, by E. N. Lockard. 



Enzymes : Machine tools of the cellular factory, by B. A. Kilby. 



The faima of America, by Austin H. Clark. 



The mechanics of snakes, by Alfred Leutscher. 



Hormones and the metamorphosis of insects, by V. B. Wigglesworth. 



Utilizing our soil resources for greater production, by Robert M. Salter. 



The carbon-14 method of age determination, by Frank H. H. Roberts, Jr. 



River Basin Surveys : The first five years of the Inter- Agency Archeological and 



Paleontological Salvage Program, by Frank H. H. Roberts, Jr. 

 Artificial lighting in America : 1830-1860, by C. Malcolm Watkins. 

 The development of the halftone screen, by Jacob Kainen. 

 The artist and the atom, by Peter Blanc. 



Report fcrr 1952. — The Report of the Secretary, which will form part 

 of the Annual Report of the Board of Regents to Congress, was issued 

 January 8, 1953: 



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, 

 1952. ix + 175 pp., 3 pis., 1 fig. (Publ. 4102.) 1953. 



SPECIAL PUBLICATIONS 



Dresses of the First Ladies of the White House, by Margaret W. Brown. 149 pp., 

 70 pis. (35 in color). (Publ. 4060.) [Aug. 19] 1952. ($6.00.) 



PUBLICATIONS OF THE UNITED STATES NATIONAL MUSEUM 



The editorial work of the National Museum continued under the 

 immediate direction of the editor, John S. Lea. Ernest E. Biebig- 

 hauser was added to the editorial staff on January 5, 1953, by transfer 

 from the Public Health Service. The Museum issued during the year 

 1 Annua] Report, 13 Proceedings papers, 3 Bulletins, and 1 paper in 

 the series Contributions from the United States National Herbarium, 

 as follows: 



ANNUAL REPORT 



Annual Report for the year ended June 30, 1952. iv + 103 pp. [Jan. 15, 1953.] 



PROCEEDINGS 



VOLUME 102 



No. 3306. The sipuneulid worms of California and Baja California, by Walter 

 Kenrick Fisher. Pp. 371-450, pis. 18-39. July 8, 1952. 



VOLUME lOIJ 



No. 3311. Two new naucorid bugs of the genus Amhrysus, by Ira La Rivers. 



Pp. 1-7, fig. 1. Feb. 12, 1953. 

 No. 3312. Tv70 new scale-mite parasites of lizards, by R. F. Lawrence. Pp. 



9-18, figs. 2-7. Mar. 10, 1953. 

 No. 3313. Notes on the biology and immature stages of a cricket parasite of the 



genus Rhopalosoma, by Ashley B. Gurney. Pp. 19-34, pi. 1, figs. 8 and 9. 

 • Mar. 10, 1953. 



