i 3 2 SCIENCE PROGRESS. 



appear to be a substance of the same nature as a dyed fibre 

 and as charcoal saturated with an acid from solution, for the 

 concentrations of the iodine in the aqueous solution and in 

 the starch obey approximately the same law as in the other 

 instances. 



We are therefore forced to conclude that whatever 

 success has attended the application of the theory of 

 solid solutions to other processes, the theory can scarcely 

 without modification be accepted as giving an explanation 

 of the process of dyeing. 



BIBLIOGRAPHY. 



J. H. VAN'T Hoff. Zeitschrift fiir physikalische Chemie, v., 322 



(1890). 

 A. VAN BlJLERT. Ibid., viii., 343 (1891). 

 O. N. WlTT. Fdrber-Zeitung, i. (1 890-91). 

 C. T. HEYCOCK and F. H. Neville. Journal of the Chemical 



Society, Ixi., 888 (1892). 



E. A. Schneider. Zeitschrift fiir physikalische Chemie, x., 425 



(1893). 

 A. Ferratini and F. GARELLI. Gazzetta chimica italiana, xxii., 



ii., 245 ; xxiii., i., 442 (1893). 



F. GARELLI. Ibid., xxiii., ii., 354 (1893). 



F. GARELLI. Zeitschrift fiir physikalische Chemie, xviii., 51 (1895). 

 F. W. KtJSTER. Ibid., xii., 508 (1893); xiii., 445 (1894) 5 xv »-> 357 

 (1895). 



F. W. KtJSTER. Liebigs Annalen, cclxxxiii., 360 (1894). 



C. HoiTSEMA. Zeitschrift fiir physikalische Chemie, xvii., 1 

 (1895). 



G. C. Schmidt. Ibid., xv., 56 (1894). 



E. Beckmann and A. Stock. Ibid., xvii., 120 (1895). 

 J. M. VAN BEMMELEN. Ibid., xviii., 331 (1895). 

 G. V. GEORGEVICS. Monatshefte fiir Chemie, xv., 705 (1894). 

 G. v. Georgevics and E. Lowy. Ibid., xvi., 345 (1895). 



James Walker. 



