Aerology no. 1: Introductory statement, 1, Sounding balloon ascensions at Fort Omaha, Nebr., May 8, 1915, 2 Meteorological observations on board U. S. C. G. cutter Seneca, Apr.-July, 1915, 3, Drexel [Nebr.] aerological station, 4, Freeair data at Drexel aerological station, Oct.-Dec. 1915; by Aerological Division, William R. Blair, in charge.

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