MAGNESIUM SULPHATE (Several timés recrystallised). 
979 
(10) 
Remarks 
rSx-o 
•g O <u 
tg.pï o o o o o o 
m^-QQQQQQ 
>>Oq 
(9) 
Excess 
^ ^ ^ ^ 
§> lO 00 o o 
— « CO 
QJ 
(/) 
Ui 
cn Tf — • Tf r~ oo ai 
' — * CVJ CVJ l> CV1 <0 
(8) 
Solubility 
at exp. 
Temp. 
41.8 at 32° 
Do 
41.3 at 31° 
41.8 at 32° 
Do 
Do 
Do 
CD 
calc. wt. 
dissolved in' 
100 grams 
water 
43.1 
43.2 
43.4 
44.2 
49.5 
54.6 
58.7 
(6) 
wt. of water 
in grams 
1.5144 
0.9845 
1.3257 
1.6444 
1.8810 
0.8937 
1.5394 
(5) 
wt. of salt 
calc. as 
anhydröus 
0.6534 
0.4255 
0.5748 
0.7266 
0.9320 
0.4883 
0.9048 
(4) 
wt. of salt 
in grams 
1.3395 
0.8722 
1.1783 
1.4895 
1.9107 
1.0020 
1.8550 
(3) 
wt. of sol. 
in grams 
2.1678 
1.4100 
1.9005 
2.3710 
2.8130 
1.3820 
2.4442 
(2) 
wt. of bulb 
and solution 
in grams 
23.9475 
18.8555 
21.9167 
21.4067 
24.2951 
23.1232 
23.3876 
(1) 
weight of 
bulb in 
grams 
(!) 21.7797 
(2) 17.4455 
(3) 20.0162 
(4) 19.0357 
(5) 21.4821 
(6) 21.7412 
(7) 20.9434 
63 
Verslagen der Afdeeling Natuurk. Dl. XXIV. A°. 1915/16. 
Recrystallised samples of cobalt sulphate (CoS0 4 , 7 H 2 0), ferrous sulphate (FeSOj, 7 H 2 0), copper sulphate (CuS0 4 , 5 H,0) etc. were 
tried for the release of the solution of MgS0 4 , 7H 2 0; but as soon as a small crystal of MgS0 4) 7 H0 2 was added, copious showers 
of crystals separate out. 
The solubility data for magnesium sulphate are taken from the work of Tilden (Trans. chem. Soc. 45, 409, 1884). 
