Cover title; Foundation and development of the Carnegie Institution of Washington, 1902-1935; The measure and inheritance of racing capacity in the thoroughbred horse; A heretofore unknown stage of development on the egg of the macaque monkey; Variations in the diatoms in relation to environment; The natural electric currents in the Earth; Explorations in Middle America; Early man in America, as illustrated by materials from Clovis and Carlsbad, New Mexico; The astronomer's instruments; The vegetation of the desert; The detrital burden of the Colorado River, as affecte4d by the completion of Boulder Dam; The factor of distribution in the interpretation of the floras of late geological periods; Solutions under high pressure; An apparatus for securing core samples from the ocean bottom; The publications of the Institution;