98 ANNUAL, REPORT SMITHSONIAN INSTITUTION, 1918. 



No. 8. Water-vapor transparency to low-temperature radiation. Frederick E. 



Fowle. October 27, 1917. GS pp. (Publ. 2484.) 

 No. 9. A new river dolphin from China. Gerrit S. Miller, jr. March 30, 1918. 



12 pp. (Publ. 24S6.) 

 No. 10. New rodents from British East Africa. N. Hollister. January 16, 



1918. 3 pp. (Publ. 2489.) 

 No. 11. The Marine Algae and marine Spermatophytes of the Tomas Barrera 



Expedition to Cuba. Marshall A. Howe. April 9, 1018. 13 pp. 



(Publ. 2491.) 

 No. 12. Exploration and field-work of the Smithsonian Institution in 1917. 134 



pp. (Publ. 2492.) 



VOLUME GO. 



No. 3. Atmospheric scattering of light. Frederick E. Fowle. May, 1918. 11 

 pp. (Publ. 2495.) 



No. 6. On periodicity in solar radiation. C. G. Abbot. January, 191S. 8 pp. 

 (Publ. 2499.) 



No. 7. Report on aircraft supply of Great Britain and a discussion of the diffi- 

 culty involved in production. June, 1918. 8 pp. (Publ. 2500.) 



SMITHSONIAN ANNUAL REPORTS. 



The completed volume of the Annual Report of the Board of Re- 

 gents for 191b" was received from the Public Printer in December, 

 1917. 



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

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

 June 30, 1916. xii, 607 pp., 143 pis. (Publ. 2449.) 



The general appendix contained the following papers, small edi- 

 tions of which were printed in pamphlet form: 



Administration and activities of the Smithsonian Institution. By A. Howard 



Clark. 19 pp. 22 pis. (Publ. 2450.) 

 News from the stars. By C. G. Abbot. 12 pp. 5 pis. (Publ. 2451.) 

 The distances of the heavenly bodies. By W. S. Eichelberger. 11 pp. (Publ. 



2452.) 

 A census of the sky. By R. A. Sampson. 12 pp. 6 pis. ( Publ. 2453. ) 

 Gun-report noise. By Hiram P. Maxim. 6 pp. 7 pis. (Publ. 2454.) 

 Molecular structure and life. By Am6 Pictet. 13 pp. (Publ. 2455.) 

 Ideals of chemical investigation. By Theodore W. Richards. 11 pp. (Publ. 



2456.) 

 The Earth : Its figure, dimensions, and the constitution of its interior. By T. C. 



Chamberlin, Harry Fielding Reid, John F. Hayford, and Frank Schlesinger. 



30 pp. (Publ. 2457.) 

 Dry land in geology. By Arthur P. Coleman. 18 pp. (Publ. 2458.) 

 The petroleum resources of the United States. By Ralph Arnold. 15 pp. 



(Publ. 2459.) 

 The outlook for iron. By James Furman Kemp. 21 pp. (Publ. 2460.) 

 The origin of meteorites. By Fr. Berwerth. 10 pp. (Publ. 2461.) 

 The present state of the problem of evolution. By M. Caullery. 15 pp. (Publ. 



2462.) 

 Some considerations on sight in birds. By J. C. Lewis. 9 pp. . 5 pis. (Publ. 



2463.) 



