[23] Francis G. Benedict: A method of calibrating gas-meters. Physical Review, vol. 22, p. 294. (1906.) [24] Atwater and Benedict: _Loc. cit._, p. 38. [25] Atwater and Benedict: Carnegie Institution of Washington Publication No. 42, p. 77. [26] In the use of logarithms space is saved by not employing characteristics. [27] Francis G. Benedict: An apparatus for studying the respiratory exchange. American Journal of Physiology, vol. 24, p. 368. (1909.) [28] Squibb: Journal of American Chemical Society, vol. 19, p. 111. (1897.) [29] Squibb: Ephemeris, 1884 to 1885, part 2, pp. 562-577. [30] Morley: Journal of American Chemical Society, vol. 26, p. 1185. (1904.) [31] W. P. Lombard: A method of recording changes in body-weight which occur within short intervals of time. The Journal of the American Medical Association, vol. 47, p. 1790. (1906.) [32] Atwater and Benedict: _Loc. cit._, p. 21.