VISCOSITY. 



23 



TABLE 6. 



This conception of the existence of hydrates differs from the view put 

 forward by Jones, 1 according to which the composition of the hydrates 

 formed by any substance is a function of the concentration, the temperature 

 remaining constant. The composition may vary all the way from one 

 molecule of water to a large number, every intermediate step being rep- 

 resented. Various lines of evidence have been furnished for this view by 

 Jones, 2 Jones and Getman, 3 Jones and Bassett, 4 and Jones and Uhler. 5 The 

 more important of these have to do with the relation between water of 

 crystallization and lowering of the freezing-point, dissociation as measured 

 by freezing-point and by conductivity, certain color changes in solution, and 

 the relation between water of crystallization and temperature. 



1 Amer. Chem. Journ., 23, 89 (1900). 2 Loc. cit. 



3 Amer. Chem. Journ., 31, 303 (1904). Ztschr. phys. Chem., 46, 244 (1903); 49, 



385 (1904). 



4 Amer. Chem. Journ., 33, 584 (1905). 

 6 Carnegie Institution of Washington Publication No. 60. Amer. Chem. Journ , 



37, 126 (1907). 



