Author: MEGGERS, W.F. AND PETERS, C.G.
Title: Measurements on the Index of Refraction of Air for Wave Lengths from 2218 A to 9000 A. Scientific Papers of the Bureau of Standards No.327.
Description: US Department of Commerce and Labor, Bureau of Standards. 1918, 1st Edition. Soft cover. 43 pages + folding chart. Good in original 7 x 10 inch stapled paper wraps, but with light library stamps and 1 1/4" long tear to cover, inside generally VG. Good.

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