vi SMITHSONIAN MISCELLANEOUS COLLECTIONS 



t6. Friedmann, Herbert. The forms of the black hawk-eagle. 

 4 pp., I pi. Feb. 28, 1950. (Publ. 4013.) 



17. Abbot, C. G. Periodic influences on Washington and New York 



weather of 1949 and 1950. 8 pp., 3 figs. Mar. 22, 1950. 



(Pnbl. 4015.) 



18. Glock, Waldo S. Tree growth and rainfall — a study of corre- 



lation and methods. 47 pp., 7 figs. Oct. 25, 1950. (Publ. 4016.) 



