262 Proceedings of the Royal Society of Edinburgh. [Sess. 
The determinations recorded in Tables I. and II. were all made at 18 o- 00 
centigrade. From first to last the temperature of the bath never varied by 
as much as -gftM C. 
Table I. 
I. 
II. 
III. 
IY. 
Y. 
VI. 
VII. 
VIII. 
Date. 
Hour. 
Capacity in 
parallel with 
Shunt on 
Second- 
ary of 
Coil. 
Resist- 
ance. 
Reading 
of 
Bridge 
Percent. 
Concen- 
tration 
of 
h 2 so 4 . 
Specific 
Conduc- 
tivity 
(mean). 
(A) 
Cell. 
(B) 
Resist- 
ance. 
4/3/07 
11.20 a.m. 
18-0 
0 
30 
500 
5*0918 
60-78 
) 
12.5 p.m 
16-5 
0 
20 
500 
5-0918 
95 
i 
> 3662-0 
5/3/07 
9.30 a.m. 
16-5 
0 
20 
500 
5-0918 
55 
i 
33 
4.0 p.m. 
18-5 
0 
20 
500 
5-0923 
55 
1 
55 
4.40 p.m. 
18-5 
0 
10 
500 
5-0923 
55 
J 
" oOO^ O 
18/3/07 
6.5 p.m. 
180 
0 
30 
500 
50922 
55 
) 
. 3669*5 
99 
6.10 p.m. 
18-0 
0 
20 
500 
5-0920 
J 
5/3/07 
10.45 a.m. 
22 '5 
0 
30 
500 
5-3470 
5845 
55 
10.50 a.m. 
22-5 
0 
50 
500 
5-3470 
55 
55 
11.5 a.m. 
22-5 
0 
50 
500 
5 3468 
55 
j 
> TtUOO o 
55 
11.10 a.m 
22-5 
0 
2') 
500 
5-3470 
55 
) 
6/3/07 
10.45 a.m. 
0 
0 
30 
400 
5-1767 
54-45 
95 
10.50 a.m. 
0 
0 
20 
400 
5-1767 
55 
C zL7^>=»'7 
55 
10.55 a.m. 
0 
0 
20 
400 
5-1766 
55 
r “± 1 OO i 
55 
11.0 a.m. 
0 
0 
20 
400 
5T765 
55 
) 
55 
11.40 a.m. 
6 
0 
20 
400 
5-4703 
50-86 
) 
55 
11 50 a.m. 
6 
0 
20 
400 
5-4702 
55 
> 5329-0 
55 
11.55 a.m. 
6 
0 
30 
400 
5-4702 
55 
S 
59 
4.45 p.m. 
0 
0 
20 
300 
5-0577 
46-43 
\ 
55 
4.50 p.m. 
0 
0 
20 
300 
5-0578 
55 
55 
5.0 p.m. 
0 
0 
30 
300 
5-0577 
55 
} 6022-1 
14/3/07 
5.5 p.m. 
0 
0 
20 
300 
5-0577 
59 
12.15 p.m. 
0 
0 
| 20 
300 
5-0576 
55 
) 
55 
1.20 p.m. 
10 
0 
20 
300 
5 4530 
37-86 
) 
55 
1.25 p.m. 
10 
0 
40 
300 
5-4531 
55 
1 
v 70 f S7-4. 
59 
1.30 p.m. 
10 
0 
40 
300 
5-4530 
55 
1 
16/3/07 
11.0 a.m. 
12 
0 
40 
300 
5-4531 
55 
) 
5 5 
12.20 p.m. 
0 
12 
40 
200 
4-5452 
33-50 
) 
55 
12.45 p.m. 
0 
12 
20 
200 
4-5453 
33 . 
1 
> 7355-6 
55 
12.50 p.m. 
0 
12 
20 
200 
4-5453 
33 
i 
> 
18/3/07 
10.25 a.m. 
0 
13 
40 
200 
4-5667 
30-91 
> 
1 
10.30 a.m. 
0 
13 
20 
200 
4-5667 
55 
l 
/ 7418-4 
10.35 a.m. 
0 
13 
20 
200 
4-5665 
55 
1 
1 
11.20 a.m. 
0 
12 
20 
200 
4-5267 
26-44 
1 
l 7?00 - l 
55 
11.30 a.m. 
0 
12 
30 
200 
4-5269 
53 
J 
r ( uUU 1 
The columns are : — 
I. and II. The date and hour of the conductivity determinations. 
III. The capacity necessary for a sharp minimum — 
(a) When in parallel with the cell. 
(b) When in parallel with the resistances. 
