Description
Item Description:Special reports: The Hudson Bay expedition, 1914, by W. J. Peters. Navigation of aircraft by astronomical methods, by J. P. Ault. The compass-variometer, by L. A. Bauer, W. J. Peters, and J. A. Fleming. Sunspot and annual variations of atmospheric electricity, with special reference to the Carnegie observations, 1915-1921, by L. A. Bauer. Studies in atmospheric electricity based on observations made on the Carnegie, 1915-1921, by S. J. Mauchly.
Physical Description:vii, 430 pages : illustrations, 15 plates (including frontispiece, maps) diagrams ; 30 cm.