816 
PROFESSOR GRAHAM ON THE DIFFUSION OF LIQUIDS. 
13. Nitrate of Lime. 
Time of diffusion 1T43 days. The diffusate was evaporated to dryness with an 
excess of sulphuric acid, and the nitrate of lime, which is always supposed anhydrous, 
was estimated from the sulphate of lime produced. 
1. Nitrate of lime, 1T7 per cent; density 1-0088. Diffused at51°-5, in eight cells, 
7-39, 776, 7'69, 7*80; mean 7‘66 grs. for two cells; calculated for 1 per cent., 6-54 
grs. at 51°-5 for two cells. 
2. Nitrateof lime, 0-985 per cent. ; density 1-00802. Diffused at 64°-l, in eight cells, 
7 47, 7-38, 7-63, 7-72 ; mean 7-55 grs. for two cells ; calculated for 1 per cent., 7-66 
grs. at 64°-l for two cells. 
3. Nitrate oflime, 1-97 per cent. ; density 1-01508. Diffused at 64°-l, in eight cells, 
15-04, 14-74, 14-55, 14-83 ; mean 14-79 grs. for two cells ; calculated for 2 per cent., 
15-01 grs. at 64°-l for two cells. 
4. Nitrate oflime, 3-94 percent.; density T0296. Diffused at 64°-l, in four cells, 
14-30, 15-29, 13-79, 13-93; mean 14-33 grs. for one cell; calculated for 4 per cent., 
14-52 grs. at 64°-l for one cell. 
5. Nitrate of lime, 7'88 per cent.; density T0582. Diffused at 64°-l, in four cells, 
27*95, 27*10, 26-80, 26-73 ; mean 27*14 grs. for one cell; calculated for 8 per cent., 
27*55 grs. at 64°-l for one cell. 
By a rise of temperature from 51°*5 to 64°-], the diffusion of the 1 per cent, solution 
increases from 6-54 to 7*66 grs., or from 100 to 1 17*1 ; which is an increase of T357 
per cent, for 1°. 
Diffusion of Nitrate of Lime in 1 1*43 days at 64°-l ; two cells. 
Grs. 
Ratio. 
From 1 per cent, solution . . 
7*66 
1-021 
From 2 per cent, solution . . 
. 15-01 
2 
From 4 per cent, solution . . 
. 29-04 
3-872 
From 8 per cent, solution . . 
. 55-10 
7*334 
The results throughout for this salt are almost identical with those of nitrate of 
baryta (p. 815), although these two salts differ greatly in solubility, and in one being 
a hydrated, and the other an anhydrous salt. 
14. Acetate of Lead. 
Diffused for 16*166 days; the time chosen before for sulphate of magnesia, with 
seven days for chloride of sodium. The solution contained 0*965 per cent, of anhy- 
drous salt, with the density T0080. As this solution of acetate of lead was found to 
be precipitated by pure water, about 2 per cent, of strong acetic acid was introduced 
into the solution, and the same acid was added in a less proportion to the water jars. 
The salt of lead diffused was afterwards determined by means of sulphuric acid. Dif- 
fused in eight cells, at 53°-], 7*45, 7*29, 7*46 and 8*07 grs.; mean 7*56; or 7*84 for 
1 per cent, in two cells. 
