122 
Mr. W. W. J. Nicol on the Molecular 
these data are to be used for mutual comparison, I have in 
many cases taken the mean of two or more independent 
determinations, as likely to possess greater accuracy than the 
results of single experiments. 
Table I. contains a complete list of the solutions experi- 
mented on, with their specific gravities and molecular volumes. 
For convenience of reference these are numbered. 
Water at 20°= 1. 
Table I. 
Strength x molec. salt to 100 H 2 0. 
No. 
X. 
Salt. 
S. 
Molec. toI. 
Kemarks. 
1. 
50 
KC1 
1-11445 
1949-84 
2. 
40 
M 
1-09415 
1917-84 
3. 
20 
> 
104959 
1857-12 
Mean of 2. 
4. 
10 
n 
1-02568 
1827-67 
3. 
5. 
05 
» 
101310 
1813-54 
2. 
6. 
50 
NaCl 
1-10276 
1897-42 
6. 
7. 
4-0 
1-08408 
1876-23 
3. 
8. 
2-0 
1-04393 
1836-29 
3. 
9. 
10 
1-02255 
1817-52 
„ 5. 
10. 
05 
» 
1-01145 
1808-54 
2. 
11. 
50 
KHO a 
1-14888 
2006-74 
2. 
12. 
40 
112264 
1963 53 
2. 
13. 
20 
fJ 
1-0(3524 
1879-58 
14. 
10 
t 
1-03373 
183907 
4. 
15. 
05 
,. 
101730 
1819-03 
16. 
50 
Na!TO a 
113813 
1954-96 
17. 
2-0 
.. 
105980 
1858-85 
18. 
10 
KC10 3 
Naao 3 
104122 
1846-49 
19. 
1-0 
1-03844 
1835-93 
20. 
10 
K 2 S0 4 
1-06744 
1840-10 
Mean of 2. 
21. 
05 
» 
103758 
1818-76 
2. 
22. 
1-0 
>xso 4 
1-06744 
181931 
23. 
05 
» 
1-03466 
1808-32 
Above diluted. 
24. 
20 
KHO 
105325 
1815-52 
From K 
25. 
2-0 
NaHO 
1-04712 
1795-40 
From Na. 
28. 
05 
MgS0 4 7 aq. 
103201 
1863 
27. 
05 
FeS0 4 7aq. 
104050 
1863-53 
28. 
0-5 
1 Taq. 
104296 
1860-43 
29. 
05 
CoS0 4 7 aq. 
1-04303 
1860-30 
30. 
0-5 
CuS0 4 5 aq. 
1-04268 
1863-22 
101 H 2 0. 
31. 
0-5 
ZnS0 4 7 aq. 
1-04367 
186218 
When a salt is in the solid state, its molecular volume 
evidently expresses the space occupied by its molecule along 
