60 



Page 27, line 10. Phil. Trans. 1877, p. 149. 



P. 27, 1. 23. '^ On Attraction and Repulsion resulting from Radiation," 

 Phil. Trans. 1874, p. 501 ; 1875, p. 519; 1876, p. 325. 



P. 27. 1. 26. Philosophical Magazine, April 1878. 



P. 27, 1. 28. Philosophical Magazine, 1875, Vol. ii., pp. 337, 446; 

 1877, Vol. i., p. 321 ; 1878, Vol. i., p. 161. 

 P. 28, 1. 7. Poggendorff's Annalen, Tom. xxxv., p. 337. 

 P. 28. 1. 9. Royal Society's Proceedings, 1878. 



P. 28, 1. 18. The Papers on the Telephone are too numerous to 

 specify. 



P. 28, 1. 19. See various Papers in " Nature," and elsewhere, during 

 the last twelve months. 



P. 28, 1. 25. Royal Society's Proceedings, May 9, 1878. 



P. 28, 1. 32. Phil. Trans., Vol. 169, pp. 55 and 155, and other Papers 

 catalogued in the Appendix to Part II. of the Memoir. 



P. 30, 1. 4. See Maxwell *' On Heat," chap. xxii. 



P. 32, 1. 1. Grunert's Archiv., Vol. vi., p. 337; also separate work, 

 Berlin, 1862. 



P. 32, 1. 1. "Linear Associative Algebra," by Benjamin Peirce, 

 Washington City, 1870. 



P. 33, 1. I. Sir W. Thomson, "Cambridge Mathematical Journal," 

 vol. iii., p. 174. Jevons' " Principles of Science," Vol. ii., p. 438. 



But an explanation of the difficulty seems to me to be found in 

 the fact that the problem, as stated, is one of the conduction of heat, 

 and that the " impossibility " which attaches itself to the expression 

 for the " time " merely means, that previous to a certain epoch 

 the conditions which gave rise to the phenomena were not those of 

 conduction, but those of some other action of heat. If, therefore, we 

 desire to comprise the phenomena of the earlier as well as of the later 

 period in one problem, we must find some more general statement ; viz., 

 that of physical conditions which at the critical epoch will issue in a 

 case of conduction. I think that Prof. Clifford has somewhere given a 

 similar explanation. 



P. 38, 1. 13. S. Newcomb " On Certain Transformations of Surfaces." 

 American Journal of Mathematics," Vol. i., p. i. 



P. 38, 1. 14. Tait " On Knots." Transactions of the Royal Society 

 of Edinburgh," Vol. xxviii., p. 145. Klein, " Mathematische Annalen," 

 ix., p. 478. 



