CONTENTS 



1. Smithsonian Meteorological Tables. Fourth revised edition. 



June, 1 91 8. lxxii + 261 pp. (Publ. no. 2493.) 



2. Dixon, H. N. The mosses collected by the Smithsonian African 



Expedition (1909-10). October 8, 1918. 28 pp., 2 pis. 

 (Publ. no. 2494.) 



3. Fowle, Frederick E. The atmospheric scattering of light. 



May, 1918. 12 pp. (Publ. no. 2495.) 



4. Lee, Willis T. Early Mesozoic physiography of the southern 



Rocky mountains. July, 1918. 41 pp., 4 pis. (Publ. no. 

 ^ 2497.) 



5. Goldman, Edward A. Mammals of Panama. April, 1920. 



309 pp., 39 pis. (Publ. no. 2498.) 



6. Abbot, C. G. On periodicity in solar variation. June, 1918. 



8 pp. (Publ. no. 2499.) 



7. Report on aircraft supply of Great Britain and discussion 



of the difficulties involved in production. June, 1918. 8 pp. 

 (Publ. no. 2500.) 



8. Dixon, H. N. Uganda mosses collected by R. Dummer and 



others. October, 1918. 10 pp., 1 pi. (Publ. no. 2522.) 



9. Aldrich, L. B. The Smithsonian eclipse expedition of June 8, 



1918. February 12, 1919. 17 pp., 4 pis. (Publ. no. 2527.) 



10. Aldrich, L. B. The reflecting power of clouds. February, 1919. 



9 pp. (Publ. no. 2530.) 



11. Hrdlicka, Ales. The races of Russia. March, 1919. 21 pp., 



1 map. (Publ. no. 2532.) 



12. De Candolle, Casimir. Begoniaceae Centrali-Americanae et 



Ecuadorenses. April 9, 1919. 10 pp. (Publ. no. 2533.) 



(v) 



