viii LIST OF CHIEF AUTHORITIES. 



Biedermann, p. 23 ; Weighing and Measuring by H. W. Chisholm, 

 (London, 1877) p. 46. (15) Everett, p. 22. (16) S. D. 

 ii. p. 7. (17) S. D. ii. p. 25 ; Rankine p. 149 ; Clarke, I. 

 (18) Jackson in Nature, October 18, 1883. (19, 20, 21) Enc. 

 Brit. Art. Elasticity by Sir William Thomson. (22) Rankine, 

 p. 197. (23) Calc. from S. D. iv. (26) S. D. ii. ; Ann, p. 

 673, 696. (27) Ann. p. 696 ; L. and B. p. 31, 32. (28) 

 Clausius, p. 59, from Regnault. (29) Agenda, p. 20. (30) 

 Jamin, II. p. 416, 423 ; L. and B. p. 188, 189. (31) Agenda, p. 

 26. (32) Watts, Supp. p. 672. The expansions calc. by 

 Rossetti. The other two columns are calc. from KupfTer's result 

 that 1 ccm. water at 4C. weighs I'OOOO 13 gm. Everett, p. 30, 

 Forster's results (S. D. ii. p. 13) are nearly identical with those 

 of W. H. Miller, and a little higher than those of Volkmaun ; 

 L. and B. p. 33. (33) Calc. from A mercury 13 "596 at 0C, cf. 

 L. and B. p. 37. (34) Regnault calc. by Clausius, p. 290, cf. 

 Jamin, II. 151 ; L. and B. p. 18. (35) L. and B. p. 51. 

 Pickering differs somewhat, see "Physical Manipulation." p. 289. 

 (36) Cf. Watts, Art. Hygrometer, by Stanley Jevons. (37) Regnault. 

 (38) J- Clerk Maxwell, Brit. Assoc. Report, 1873. (39) Enc. 

 Brit. Heat, by Sir Wm. Thomson, cf. L. and B. p. 195. (40) 

 Watts, Supp. III. Thermodynamics, by G. C. Forster, for the 

 mechanical equivalent of Heat (41) The Solar Spectrum, 



chiefly from Angstrom ; the Metals from Agenda, p. 127. (42) 

 Biedermann, p. 62 ; Agenda, p. 87 ; Jamin, III. 440. (43) 

 Agenda, p. 88. (45) Jamin II. 576, 580, 581. (47) Des- 

 chanel trans. Everett, p. 820. (48) Jamin, II. p. 520. (49) 

 Enc. Brit. Dimensions, by Clerk Maxwell, Levy, Everett, p. 3 

 (54) Communicated by Prof. A. W. Reinold. (60) Everett, p. 

 134 ; Jenkin, p. 97 ; Thompson, p. 226. (61) Everett, p. 147. 

 (62) Nature for Feb. 8, 1883. Clerk Maxwell, see "Elementary 

 Electricity," p. 196. (63) Everett, p. 146 ; S. Thompson, p. 145 ; 

 Hospitalier, p. 174. (65) Jenkin, p. 249, calc. from Matthiessen, 

 cf. L. and B. p. 231. (These numbers must have their reciprocals 

 multiplied by 95*41 to reduce to B.A. multiplied by 10 6 units.) 

 (66) L. and B. p. 104 ; Hospitalier, p. 151. (67) Everett, 

 p. 144. (68) Jenkin, p. 258. (70) Jenkin, p. 176, from 



