810 PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
The diffusion of the different proportions of this acid at one temperature is as 
follows : — 
Diffusion of Nitrate of Water in five days at 51°‘2 ; two cells. 
Grs. 
Ratio. 
From 1 per cent, solution . 
.... 6*99 
0*95 
From 2 per cent, solution . 
.... 14*74 
2 
From 4 per cent, solution . 
.... 28*76 
3*90 
From 8 per cent, solution . 
.... 57*92 
7*86 
The 2 per cent, solution is taken as the standard of comparison for the ratios, 
instead of the 1 per cent, solution, from the greater accuracy with which the diffusion 
of the former can be observed. 
The usual approach to equality of diffusion, between chlorides and nitrates, is ob- 
servable in hydrochloric and nitric acids, at least in the 1 and 2 per cent, solutions. 
Diffusion from 1 per cent, solution at 53 °' 5 . 
Hydrochloric acid 7*56 100 
Nitrate of water 7‘28 96'3 
Diffusion from 2 per cent, solution. 
Hydrochloric acid at 51° . . . . 15'04 100 
Nitrate of water at 51°’2 .... 14*74 98*0 
The 2 per cent, solutions of both acids were also diffused at higher temperatures. 
Diffusion from 2 per cent solution. 
Hydrochloric acid at 62°'8 . . . 16*46 100 
Nitrate of water at 63°*2 .... 16*76 101*8 
Here the diffusibility of the two acids is as nearly as possible equal. 
Diffusion from 4 per cent, solution. 
Hydrochloric acid at 5 1° .... 30*72 100 
Nitrate of water at 5 1°*2 .... 28*76 93*7 
Diffusion from 8 per cent, solution. 
Hydrochloric acid at 51° . . . . 67'68 100 
Nitrate of water at 51°-2 .... 57*92 85*3 
The wide divergence between these two acids, in the 8 per cent, solution, is pro- 
duced by the remarkably increased diffusion of hydrochloric acid in that high pro- 
portion. 
