PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
29 
gi’S,, and for the 4 per cent, solution, 11*19 and 11*49 grs. The bicarbonate of potash 
also exhibits a considerable analogy to the carbonate, but resembles still more closely 
the acetate. It is thus obvious that equality, or similarity, of diffusion is not con- 
fined to the isomorphous groups of salts. 
(4.) The nitrates of potash and ammonia have already appeared to be equidiffusive 
at two different temperatures. They were diffused again in the same proportions as 
the last salts, at a temperature varying from 63° to 67°*5. 
Table X. — Diffusion of Nitrate of Potash and Nitrate of Ammonia at 65°*9. 
Parts of anhydrous salt to 100 water. 
Density of solu- 
tion at 60°. 
Experiments. 
Mean. 
Nitrate of potash. 
2 
1-0123 
7-34 
7-58 
7*49 
7*47 
4 
1-0243 
13- 66 
14- 24 
14-02 
13-97 
1-0393 
22-11 
22-94 
22-05 
22-37 
10 
1-0581 
32-06 
32-90 
32-50 
32-49 
Nitrate of ammonia, NH 4 0, NO 5 . 
2 
1-0080 
7-85 
7-71 
7-64 
7-73 
4 
1-0154 
14-20 
14-79 
14-45 
14-48 
6i 
1-0256 
23-66 
23-35 
22-22 
22-74 
10 
1-0375 
34-94 
33 - 49 
34- 23 
34-22 
The solution of nitrate of ammonia of the water-jars was evaporated carefully at a 
temperature not exceeding 120 ° Fahr., to prevent loss of the salt by sublimation or 
decomposition. 
Diffusion at 65°*9. 
2. 
4 . 
6|. 
10. 
Nitrate of potash 
7*47 
13-97 
22-37 
32-49 
Nitrate of ammonia 
7*73 
14-48 
22-74 
34-22 
Although these salts eorrespond elosely, it is probable that neither the diffusion of 
these nor the diffusion of any others is absolutely identical. The nitrate of ammonia 
appears to possess a slight superiority in diffusion over the nitrate of potash, which 
