820 
PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
While at the higher temperatures, namely, 63°'8 for the chloride of calcium, and 
64°*1 for the nitrate of lime, the results for the different proportions of salt are — 
Chloride of calcium, 1 per cent. . 
7-92 
100 
Nitrate of lime, 1 per cent. . . 
7-66 
96*72 
Chloride of calcium, 2 per cent. . 
. 15*35 
100 
Nitrate of lime, 2 per cent. . 
. 15*01 
97*79 
Chloride of calcium, 4 per cent. . 
. 30*78 
100 
Nitrate of lime, 4 per cent. . . 
. 29*04 
94*35 
Chloride of calcium, 8 per cent. . 
61*56 
100 
Nitrate of lime, 8 per cent. . . 
. 55*10 
89*51 
The correspondence between the 1 and 2 per cent, solutions of chloride and nitrate 
is sufficiently close, but in the 4 and 8 per cent, the salts diverge, as happens also 
with hydrochloric and nitric acids themselves. The nitrate in both cases falls off, 
while the chloride sustains throughout the high diffusibility of the lower proportions. 
19. Chloride of Manganese. 
Time of diffusion 1T43 days. The salt diffused was estimated by means of nitrate 
of silver. 
The 1 per cent, solution, of density T00S5, gave at 50°'8, in eight cells, 6’67, 6’26, 
6‘79 and 6'8] grs. ; mean 6’63 for two cells. 
20 . Nitrate of Magnesia. 
Time of diffusion 1T43 days. The salt diffused was estimated as sulphate. 
The 1 per cent, solution, of density 1’0073, gave at 50°'8, in eight cells, 6’29, 6‘39, 
6*52 and 6*76 grs.; mean 6*49 for two cells. 
2 1 . Nitrate of Copper. 
Time of diffusion 1T43 days. The salt diffused was estimated from the oxide of 
copper obtained by ignition. 
The 1 per cent, solution, of density 1*0075, in eight cells, at 50°*8, gave 6*52, 6*36, 
6*18 and 6*70 grs. ; mean 6*44 for two cells. 
Comparing the preceding salts with chloride of calcium diffused at the same tem- 
perature, 50°*8, we have the following results : — 
Chloride of calcium 6*51 100 
Chloride of manganese 6*63 101*85 
Nitrate of magnesia 6*49 99*69 
Nitrate of copper 6*44 98*92 
This group of salts, belonging to the same isomorphous family of bases, the mag- 
nesian, again correspond closely in diffusibility. 
The following additional magnesian chlorides were diffused, all 1 per cent, solu- 
