OP ARTS AND SCIENCES. 145 



Estimating the weight rather arbitrarily, I have combined them as 

 follows : — 



No. 



1 



2 



3 



4 



5 



G 



7 



8 



9 

 10 



Mean 331.75 

 Or, corrected for the normal carbonic acid in the atmosphere, it be- 

 comes 331.78 meters per second in dry pure air at 0° C. 



18 Clement et De'sormes, Journal de Physique, lxxxix. 333, 1819. 



19 Laplace, Mcc. Celeste, v. 125. 



29 Masson, Ann. de Chim. et de Phys., ser. 3, torn. liii. 



21 Weisbach, Der Civilingenieur, Neue Polge, Bd. v., 1859. 



22 Him, Theorie Mec. de la Clialeur, i. 111. 



23 Pavrc et Silbermann, Ann. de Cliim., ser. 3, xxxvii. 1851. 



24 Cazin; Ann. de Cliim., ser. 3, torn. Lwi. 



25 Duprc, Ann. de Cliim., 3 mc ser., lxvii. 359, 1863. 



26 Kohlrausch, Pogg. Ann., exxxvi. 618. 



27 Rontgen, Pogg. Ann., cxlviii. 003. 



28 Janiin and Richard, Comptes Rend., lxxi. 336. 



29 Tresea and Laboulaye, Comptes Rend., lviii. 358. Ann. du Conserv. des 

 Arts et Metiers, vi. 365. 



30 Amagat, Comptes Rend., lxxvii. 1325. 



31 Mem. de l'Acad. des Sei., 1738, p. 128. 

 82 Benzcnberg, Gilbert's Annalen, xlii. 1. 

 33 Goldingliam, Phil. Trans., 1823, p. 96. 



81 Ann. de Cliim., 1822, xx. 210; also, (Euvres de Arago, Me'm. Sci., ii. 1. 



85 Stampfer and Von Myrbacli, Pogg. Ann., v. 496. 



w Moll and Van Beek, Phil. Trans., 1824, p. 424. See also Shrdder van der 

 Kolk, Phil. Mag., 1805. 



*» Parry and Foster, Journal of the Third Voyage, 1824-5, Appendix, p. 86. 

 Phil. Trans., 1828, p. 97. 



38 Savart, Ann. de Chim., ser. 2, lxxi. 20. Recalculated. 



89 Bravais and Martins, Ann. de Chim., ser. 3, xiii. 5. 



40 Regnault, Rel. des Exp., iii. 533. 



41 Delaroclie and Be'rard, Ann. de Chim., lxxxv. 72 and 113. 



42 Puluj, Pogg. Ann., clvii. 656. 



vol. xv. (n. s. vn.) 10 



