190 
ME. T. ft EATTAM ON LIQUID DIFEUSION APPLIED TO ANALYSIS. 
a particular substance becomes a standard of comparison for single experiments on the 
diffusion of other substances. The substances selected were chloride of sodium and 
cane-sugar. 
Table III. — Diffusion of a 10 per cent, solution of Chloride of Sodium in different 
times. 
Number of stratum. 
In four days, 
at 9° to 10°. 
i In five days, 
1 at ll°-75. 
In seven days, 
at 9°. 
In fourteen days, 
at 10°. 
1 
•004 
•004 
•013 
•104 
2 
•004 
•006 
•017 
•129 
3 
•005 
•Oil 
•028 
•162 
4 
•Oil 
•020 
•051 
•198 
5 
•023 
•040 
•081 
•267 
6 
•040 
•075 
•134 
•340 
7 
•080 
•134 
•211 
•429 
8 
•145 
•233 
•318 
•535 
9 
•261 
•368 
•460 
•654 
10 
•436 
•589 
•640 
•766 
11 
•706 
•762 
•850 
•881 
12 
1-031 
1-090 
1-057 
*991 
13 
1-416 
1-357 
1-317 
1-090 
14 
1-815 
1-697 
1-527 
1*187 
15 and 16 
4-023 
3-613 
3-294 
2-266 
10-000 
9*999 
9*998 
9*999 
Table IV. — Diffusion of a 10 per cent, solution of Cane-sugar in different times. 
Number of stratum. 
In one day, 
at 10°-75. 
In two days, 
at 10°. 
In six days, 
at 9°. 
In seven days, 
at 9°. 
In eight days, 
at 9°. 
In fourteen days, 
at 10°. 
1 
•001 
•002 
•002 
•005 
2 
•002 
•002 
•003 
•008 
3 
•002 
•003 
•003 
•012 
4 
•002 
•004 
•004 
•016 
5 
•003 
•004 
•007 
•030 
6 
•005 
•007 
•012 
•059 
7 
•on 
•020 
•031 
•102 
8 
•002 
•002 
•024 
•051 
•072 
•180 
9 
•002 
•008 
•071 
•121 
•154 
•305 
10 
•005 
•027 
•170 
•260 
•304 
*495 
11 
•024 
•107 
•376 
•507 
•555 
•740 
12 
•133 
•344 
•727 
•897 
•858 
1-075 
13 
•597 
•930 
1-282 
1-410 
1-365 
1-435 
14 
1-850 
1*940 
1-930 
1-950 
1-955 
1-758 
15 and 16 
7*386 
6-641 
5-392 
4-760 
4-674 
3-783 
9*999 
9*999 
9*998 
9*998 
9*999 
10-003 
The scheme of the diffusion of the chloride of sodium may afford terms of comparison 
for the metallic salts, acids and other highly diffusible substances, while the scheme of 
sugar will be found more useful in appreciating the diffusion of organic and other less 
diffusible substances. In comparing the two Tables together, it appears that a fom- 
teen days’ diffusion of sugar is greater in amount than a four days’ diffusion of chloride 
of sodium, but less than a five days’ diffiision of the same substance. The diffusion of 
