54 Carnegie; institution of Washington. 



WiLLCOX, Walter F. Our gain in population through immigration. (National Civic 



Federation Review. Nov.-Dec, 1906.) 

 . Facts on immigration. (Report of proceedings of conferences on immigration 



held in New York City, Sept. 24 and Dec. 12, 1906, by the Immigration Department 



of National Civic Federation. Jan., 1907.) 

 Williamson, Charles C. The finances of Cleveland. (Columbia University Studies 



in History, Economics, and Public Law. 1907.) 

 Wilson, Edmund B. Note on the chromosome-groups of Metapodius and Banara. 



(Biol. Bull. Apr., 1907.) 

 Wright, F. E. Measurement of the optic axial angle of minerals in the thin section. 



(Amer. Jour. Science. Oct., 1907.) 



. See also Day, A. L. _ _ 



Zahm, A. F. Law of atmospheric resistance of rods and wires. (Navigating the A.ir, 



Doubleday, Page & Co. 1907.) 



