Cold Waves and Their Progress: A Preliminary Study; Prepared under the Direction of Brig. & Bvt. Maj. Gen'l W. B. Hazen by Thomas M. Woodruff [Signal Service Notes, no. 23]
Washington, D.C. Signal Office, 1885. Paperback. 21 p.: tables; 24 cm. Plain wrapper printed in black. Caption title: Cold Waves and Their Progress Across the United States. In 1870 the U.S. military was authorized to begin taking meteorological observations across the country. Because the information was most quickly communicated nationwide..... More