of the Fishery Board for Scotland. 
103 
Table II. 
Deliquescence of samples of fishery salt sifted to similar fineness, and 
exposed, after drying, to a moist atmosphere in a closed chamber at 
ordinary temperature of laboratory, viz., 54° F. 
Sample. 
Moisture gained by 100 grams salt in 
1 day. 
2 days. 
3 days. 
5 days. 
Nos. 1 
2-38 
2-64 
4-98 
8-38 
2 
1-71 
2-83 
5-40 
12 03 
3 
2-72 
4-29 
7-77 
15-95 
4 
2-83 
3-23 
5-56 
11-43 
5 
3-53 
6-76 
7-58 
11-68 
6 
3-01 
5-41 
4-80 
5-92 
7 
2-00 
2-26 
2-52 
2-57 
8 
6-97 
7-69 
12-24 
16-42 
9 
13-40 
20-16 
25-02 
32-18 
10 
9-34 
13-53 
16-21 
19-81 
The daily increase (or otherwise) in the weight of 100 grams is better 
seen on the accompanying chart where they are plotted down as curves. 
The deliquescence of 2, 3, and 4 somewhat increases, while that of the 
others somewhat diminishes, in intensity with the time. The irregu- 
larities found in some of the curves are confirmed by duplicate tests. 
They are probably due to some peculiarity in the impurities, and 
deserve further study. The pauses may refer to definite states of 
hydratation of the impurities. No. 6 is the most difficult to understand. 
On each occasion that the experiment was made it lost moisture during 
the 3rd day, and regained it slowly thereafter. 
Table III. 
Weight of salts deposited by 100 grams of solutions of salt samples 
(saturated solutions at 54° F. or 12° "2 C.) when dried at 95° C. 
Also the specific gravity of solutions saturated at 54° F. 
No. 
Weight of Deposit. 
Specific Gravity, 
1 
26-52 
1-2059 
2 
26-37 
1-2096 
3 
26-43 
1-2055 
4 
26-59 
1-2074 
5 
26-56 
1-2067 
6 
26-66 
1-2069 
7 
26-46 
1-2061 
8 
?6-71 
1 -2082 
9 
27-08 
1-2114 
10 
26-76 
1-2074 
A. P. AITKEN. 
mh April 1891. 
