To serve in the scientific army, to have shown some initiative, and to be rewarded by the consciousness that in the eyes of his comrades he bears the accredited accolade of successful endeavor, is enough to satisfy the legitimate ambition of every earnest student of nature.

Annual Report of the Board of Regents of the Smithsonian Institution, 1902, History of Cold and the Absolute Zero (p. 240), Government Printing Office. Washington, D.C. 1903