REVERSIBLE AND IRREVERSIBLE SYSTEMS UNDER INFLUENCE OF LIGHT. 399 
Average 
amp&res 
observed 
in 
10" 9 
unit-s. 
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 
from 
Rubens 
thermo¬ 
pile, 
in 
centi¬ 
metres. 
Intensity 
of light 
measured 
with 
Rubens 
thermopile 
at the 
distance 
given 
by Column 
XVI., in 
millimetres 
(right 
and left). 
Tempe¬ 
rature of 
bath, 
in ° C. 
Temperature 
of room, 
in ° C. 
Kind of cell. 
Kind of 
light used. 
Volts and amperes when 
arc was used. 
Photo¬ 
graphic 
plate 
number. 
XI. 
XII. 
XIII. 
XIV. 
XV. 
XVI. 
XVII. 
XVIII. 
XIX. 
XX. 
XXI. 
XXII. 
IK Sol 
ution (n 
o Solid I 
Ag added 
)• 
- 
- 
18-4 
16*4 
125 
— 
118 
ordinary temperature 
constant 
total light 
arc : 66 volts, 6 '2 amperes 
_ 
_ 
18 -4 
16'4 
• 125 
_ 
118 
ordinary temperature 
constant 
blue screen 
arc : 66 volts, 6 ‘2 ampSres 
— 
— 
18-4 
16-4 
125 
— 
118 
ordinary temperature 
constant 
red screen 
arc : 66 volts, 6 - 2 ampSres 
_ 
18-4 
16 ’4 
125 
_ 
118 
ordinary temperature 
constant 
green-yellow 
arc : 66 volts, 6 *2 amperes 
screen 
— 
— 
18-2 
16-8 
125 
— 
118 
ordinary temperature 
constant 
total light 
arc : 66 volts, 6 '2 amperes 
— 
— 
18-2 
16-8 
J 125 
— 
118 
ordinary temperature 
constant f 
blue screen 
arc : 66 volts, 6 '2 amp&res 
- 
— 
18 "2 
16-8 
\ 92 
- 
118 
ordinary temperature 
constant L 
blue screen 
arc : 66 volts, 6 '2 ampSres 
- 
— 
18 -2 
16-8 
92 
— 
118 
ordinary temperature 
constant 
red screen 
arc : 66 volts, 6 '2 amp&res 
_ 
18-2 
16-8 
92 
118 
ordinary temperature 
constant 
yellow-green 
arc : 66 volts, 6*2 amperes 
screen 
- 
— 
18 -0 
16 '3 
r 125 
— 
118 
ordinary temperature 
constant f 
total light 
arc : 66 volts, 6 *2 amperes 
20 
— 
— 
18-0 
16-8 
1 125 
— 
118 
ordinary temperature 
constant L 
total light 
arc : 66 volts, 6 '2 amp&res 
- 
18-0 
16'8 
125 
— 
118 
ordinary temperature 
constant 
total light 
arc : 66 volts, 6 '2 ampbres 
and Solid AgBr. Role of the Electrode. 
* 
- 
17-3 
16-8 
82 
— 
98 
— 
— 
inconstant 
total light 
arc : 66 volts, 6 '2 ampdres 
24 
• . — 
_ 
17-3 
16-8 
30 and 42 
98 
inconstant 
blue screen 
arc : 66 volts, 6 "2 ampbres 
— 
17-3 
16-8 
82 and 30 
— 
98 
— 
— 
inconstant 
red screen 
arc : 66 volts, 6 '2 amperes 
_ 
17-3 
16-8 
82 and 30 
98 
inconstant 
yellow-green 
arc : 66 volts, 6 ‘2 amperes 
screen 
— 
— 
17-3 
16-8 
32 
— 
59 
ordinary temperature 
inconstant 
total light 
acetylene 
— 
— 
17-3 
16-8 
42 
- 
59 
ordinary temperature 
inconstant 
total light 
acetylene 
galvanometer = 40 ohms. 
