476 



MR. S. CHAPMAN OX THE KIXKTIC THEORY OF A GAS 



latter case the apparent size includes part of the extension of the field of force of the 

 molecule. In selecting the values of f*. a and C I have preferred to use the mean 

 of recent determinations (where these exist) rather than to go back to GRAHAM'S or 

 OBERMAYER'S experiments. 



1 Authorities: The value of to is a mean of 1714 ('LANDOLT and BERNSTEIN'S Tables'), 1713 (Hooo, 

 'Proc. Amer. Acad.,' 40, 18, p. 611,. 1905), 1733 (BREITENBACH, 'Ann. d. Phys.,' 5, 1901, p. 166), 

 1730 (SCHULTZK, 'Ann. d. Phys.,' 5, 1901, p. 140), 1736 (TiNZLER, 'Verb. Deutsch. Phys. Gesell.,' 8, 

 p. 221, 1906), and 1702 (GRINDLEY and GIBSON, 'Roy. Soc. Proc.,' A, 80, p. 114); the value of C is a 

 mean of 119-4 (BREITENBACH), 113 (SUTHERLAND, 'Phil. Mag.,' February, 1909, p. 320), 111 -3 (RAY- 

 LEIGH, ' Scientific Papers,' vol. iv., p. 452, p. 481), and 102-5 (GRINDLEY and GIBSON). 



4 i^ is the mean of 864 ('LANDOLT'S Tables'), 857-4 (BREITENBACH, loc. cit.), 841 (MARKOWSKI, 'Ann. 

 d. Phys.,' 14, p. 742, 1904); C is the mean of 71-7 (BREITENBACH), 72-2 (RAYLEIGH, loc. cit.), 83 (MAR- 

 KOWSKI, loc. cit.), 79 and 72 (SUTHERLAND, 'Phil. Mag.' (5), 36, p. 507, 1893, and February, 1909, p. 320). 



3 The mean of 1873 (LANDOLT) and 1926 (MARKOWSKI, loc. cit.); C from 128-2 (RAYLEIGH, 'Roy. Soc. 

 Proc.,' 62, 1897; 66, 1900; 67, 1900), 138 (MARKOWSKI), 127 and 128 (SUTHERLAND, loc. cit.). 



4 GRAHAM and OBERMAYER (cf. MEYER'S 'Kinetic Theory') 1660, 1670, and MARKOWSKI, 1675; 

 C from 115, 113 (MARKOWSKI), 109, 110 (SUTHERLAND, loc. cit.). 



6 to from JEANS' treatise, p. 251 (due to OBERMAYER); C from SUTHERLAND, loc. cit. 



6 BREITENBACH'S value of to, and his and SUTHERLAND'S values of C (239, 258) ; both as previously 

 cited. 



7 to from 'LANDOLT'S Tables'; C from SUTHERLAND, 'Phil. Mag.,' February, 1909, calculated from 

 ' LANDOLT'S Tables.' 



8 to from 1891 (ScHULTZE, loc. cit.), 1887 (SCHIERLOH, 'Halle Diss.,' 1908, cited by SCHMITT, 'Ann d 

 Phys.,' 30, 1909, p. 393), 1879 (RANKINE, 'Phil. Mag.,' January, 1911, p. 45); and C from 80-3 



(SCHULTZE), 72 '2 (RAYLKIGH), 78 "2 (SCHIERLOH), 70 (RANKINE), 76 (SUTHERLAND, loc. cit.). 



9 to from 2104 (ScHULTZE, loc. cit.), 2114 (SCHIERLOH, loc. cit.), 2102 (RANKINE, loc. cit.); C from 169-9 

 174-6, 142 (by the preceding three authorities), and 160 (SUTHERLAND, loc. cit.). 



10 RANKINE (loc. cit.). 



