REVERSIBLE AND IRREVERSIBLE SYSTEMS UNDER INFLUENCE OF LIGHT 397 
Average 
amperes 
observed 
in 
10' 9 
units. 
Average 
volts 
observed 
in 
10 -6 
units. 
Calibration 
of 
Nalder Nl, 
in 
centimetres 
(right 
and left). 
Calibration 
of 
Nalder N2, 
in 
centimetres 
(right 
and left). 
Distance 
of 
light from 
quartz 
vessel, in 
centi¬ 
metres. 
Distance 
of 
light 
irom 
Pubens 
thermo¬ 
pile, 
in 
centi¬ 
metres. 
Intensity 
of light 
measured 
with 
Pubens 
thermopile 
at the 
distance 
given 
by Column 
XVI., in 
millimetres 
(right 
and left). 
Tempe¬ 
rature of 
bath, 
in ° C. 
Temperature 
of room, 
in 0 C. 
Kind of cell. 
Kind of 
light used. 
Volts and amperes when 
arc was used. 
XT. 
XII. 
XIII. 
XIV. 
XV. 
XVI. 
XVII. 
XVIII. 
XIX. 
i xx. 
XXI. 
XXII. 
(Both 
sides of 
each Plat 
e covered 
with Ag 
Br • Gla 
ss Vessel 
instead 
1 
of Quartz Vessel used. 
- 
— 
16'0 
16‘0 
89 
123 
46-5 
12-5 
— 
constant 
total light 
acetylene 
16’0 
16-0 
89 
123 
46-5 
13-5 
— 
constant 
total light 
acetylene 
- 
16 0 
16 '0 
89 
123 
47*0 
13-5 
— 
constant 
total light 
acetylene 
plates cleaned and freshly covered with A 
gBr on 
December 17, 1904; one side covered with paraffin):— 
— 
— 
19-3 
15*75 
115-116 
146 
20-05 
16 
- 
constant 
total light 
acetylene 
— 
19-2 
15 '75 
115-116 
146 
20-05 
16 
— 
constant 
total light 
acetylene 
-- 
— 
19-2 
16*05 
115-116 
146 
21*5 
16 
— 
constant 
total light 
acetylene 
- 
— 
19'2 
16-05 
115-116 
146 
21-5 
16 
— 
constant 
total light 
acetylene 
— 
21 '2 
16 *05 
115-116 
146 
21-5 
16 
— 
constant 
total light 
acetylene 
1 “ 
— 
21'2 
16-05 
115-116 
146 
21-5 
16 
— 
constant 
total light 
acetylene 
into an Inconstant Cell (Ag in Light, KBr Solution, Ag-BrAg in the Dark). 
16*3 
16*2 
76 
| 58-5 
ordinary temperature 
inconstant 
total light 
acetylene 
(polarisation) 
1 
Photo¬ 
graphic 
plate 
number. 
16 
17 
18 
15 
I 
