400 DR. MEYER WILDERMAN ON THE CHEMICAL STATICS AND DYNAMICS OF 
Photo¬ 
graphic 
plate 
number. 
I. 
21 
23 
To all 
Electrodes. 
Solution. 
Date of 
experiment. 
The E.M.F. in 
the dark, in 
centimetres on 
Nalder Nl. 
The 
E.M.F. in 
the dark, 
in units oi 
10 -6 volts. 
Number of 
experiment 
(curve) when the 
system was 
exposed to light. 
Maximum constant 
deflection observed when 
the system was 
exposed to light, in 
millimetres on Nalder Nl. 
Resistance 
of the 
solution in 
cell, 
in ohms. 
Total 
resistance of 
circuit, 
in ohms. 
II. 
hi. 
IV. 
V. 
VI. 
VII. 
VIII. 
IX. 
X. 
_ 
Table X.—The Electrical Potential between the 
t 
Hg, solid Hg 2 CL 2 in Decinormal NaCl and HC1 Solutions, 
Hg, Hg 2 Cl 2 in 
light and in 
dark 
0*1 normal 
NaCl 
July 25, 1904 
10*0 centims.* 
to left 
-- 
no deflection, perhaps £ 
83 
Resistance of 
galvanometer 
= 834'4 ohms; 
shunt of 
galvanometer 
=1000 ohms 
ditto 
ditto 
J uly 26, 1904 
4 *3 centims.* 
to left 
— 
no deflection, perhaps J 
83 
ditto 
ditto 
0*1 normal 
HC1 
July 26, 1904 
7 *2 centims.*, 
to right 
no deflection, perhaps 4 
83 
ditto 
ditto 
ditto 
July 27, 1904 
23*3 centims.* 
to right 
- 
no deflection, perhaps £ 
83 
ditto 
Hg, Hg 2 Br 2 in 
light and in 
dark 
0*1 normal 
KBr 
February 27,1904 
compensated by 
opposite E.M.F. 
1 centim. 
to left 
1 and 2 
no deflection 
no shunt 
ditto 
0*1 normal 
NaBr 
February 27,1904 
ditto 
— 
3 
perhaps J- to 1 
— 
no shunt 
Table XI.—Hg, solid Hg 2 I 2 in KI Solution, and 
Hg, solid Hg 2 I 2 in Solution of KI could not be investigated, 
Hg,SO,Hg 2 in 
light and in 
dark 
0*1 normal 
SO4. (NH 4 ) 2 
December 9,1904 
17 *8 centims. 
to left 
1, 2, 3 
44 -5, 51 ’5, 42 '5t 
ditto 
ditto 
December 9,1904 
ditto 
- 
4, 5 
21, 20'5 
- 
the above investigations the intensity of light measured with the Rubens thermopile (Column XVII.) gives the 
Column XVI., and when the sensitiveness of Nalder No. 2 was that given by 
* With 1000 ohms 
t Did not return to zero deflection 12, 6,J>J millims. ; no shunt used with the galvanometer. Height of Hg = circa 
