This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...pp. 5 and 55) is adopted as 4-l8o joules = 4180 x 107 ergs, being the mean of the results of Rowland (1879) arjd of Reynolds and M00rby (reduced), each of whom used a mechanical method of determining "J." Thus the values of J below do not rest on the values attributed to the electrical standards employed. The specific ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ...pp. 5 and 55) is adopted as 4-l8o joules = 4180 x 107 ergs, being the mean of the results of Rowland (1879) arjd of Reynolds and M00rby (reduced), each of whom used a mechanical method of determining "J." Thus the values of J below do not rest on the values attributed to the electrical standards employed. The specific heat of water is a minimum at 37-5 C. The 15 calorie (according to Barnes, Proc. Roy. Soc, 1909) = 4" 184 joules, assuming the e.1n.f. of the Clark cell at 15 C. = r433o international volts. The mean calorie (= Jo of heat required to raise 1 gram of water from 0 to too0 C.) = 4-185 joules (Barnes, 1909); = 4184 joules (Reynolds and M00rby, 1897, corrected by Smith). SPECIFIC HEAT OF MERCURY In terms of the gram calorie at i50,5 on the const, vol. H. scale. (Barnes and Cooke, Phys. Rev, 15, 1902.) Mercury has a minimum specific heat at 140 C. (Barnes, Brit. Ass. Rep., 1909.) SPECIFIC HEATS OF THE ELEMENTS For gases, see p. 58. (See Waterman, Phys. Rev., 1896, and Bornstein and Scheel in L.B.M.) SPECIFIC HEATS SPECIFIC HEATS OF GASES AND VAPOURS The values at const, pressure are, unless otherwise stated, all at atmospheric pressure. heats given are calories per gram of gas per degree C. at the temp. stated. The specific B. & O., Berthelot & 0, jier; D., Dittenberger; 11. & A., Holborn & Austin (Reichsanslalt); W., Wiedemann. H. & H., Holbo1n Nitrogen (0-1400), cf =-2350 +-000019/ 1 and Henning CO, (0-1400), cfi = 2010 +-0000742/--0, l8/5 fjn'o'c1 (Reichsaustalt). Water vapour (100-14000), =-4669---0030168/ + 0-44/' I t Air, c v =-1715 +-02788p where pis the density (gm./cc). C02, cv = 165 +-2l25p +-34p p being density I H, Cv diminishes with increasing density and falling ternp. J N, cv---175 + "00OI6...
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