cover-title, p. 265-305, il. 1 pl. 8 p. of pl. and maps, 4°
Notes:
Notes:
SPECIAL ARTICLES.—Solar and sky radiation measurements during June, 1918; by Herbert H. Kimball.—Solar disturbances and terrestrial weather: 3, Faculae and solar constant compared with barometric gradients [with list of references]; by Ellsworth Huntington.—Lacustral record of past climates; by Charles Rollin Keyes.—Crop centers of United States; by J. Warren Smith.—Lawn sprinkler and thermograph; by William G. Reed.