358 DR. MEYER WILDERMAN ON THE CHEMICAL STATICS AND DYNAMICS OF 
did not always wait for complete return of the system to the last millimetre, because 
he had to keep the light of the arc constant during the whole series of experiments. 
The deflection in (7) is 24 millims. (removed from zero deflection in the dark 
2 millims.); in (8) 24 millims. (corr. 26 millims.); in (9) 26 millims. (corr. not returned 
2 millims.); in (10) 24 millims. (corr. 26 millims., not returned 1 millim.); in (ll) 
23 millims. (corr. + 2 millims. + 1 millim. = 26 millims.); in (12) 23-5 millims. 
(corr.+ 2 millims.+ 1 millim. = 26’5 millims). Thus we have for N7, 8, 9, 10, 
11, 12, if not corrected, deflections: 24, 24, 26, 24, 23, 23’5, average 24 millims. 
= 28'lxl0~ 9 ampere = 24 x 10“ 6 volt; and if corrected : 24, 26, 26, 26, 26, 26 - 5 
25-8 millims. = 30‘2 x 10~ 9 ampere = 257 x 10" 6 volt (at a distance of 33 centims. 
of the arc from quartz vessel). We find 37 2 x 18 = 24-6 x 10 3 (not corr.) and 
33 2 x 24 = 26T x 10 3 (not corr.) and 37 2 x 197 = 27 x 10 3 (corr.) and 33 2 x 25‘3 = 27’5 x 10 3 
(corr.), i.e., the deflection in light , or the E.M.F. created by the light , is directly 
proportional to the intensity of the light. 
Curve (13) consists of 5 Curves. —Here the author purposely arranged that the 
system, after it reached its constant state in light, should in each successive experi¬ 
ment be more and more removed from its state in the dark, passing smaller and 
smaller parts of the deduction period by every time screening the system from light 
for shorter and shorter periods. We see that however much or little the system 
traversed the part of the curve giving the deduction period, it always returns in light 
to the same line, and this is very clear evidence that the state of the system in 
light of a given intensity and composition is a strongly defined and a constant one. 
In the last portion of Nl3 the system was allowed to completely return to its initial 
state in the dark, and this shows again that the point in the dark is a perfectly 
defined and a constant one. 
Curves 14, 15, 16 were again taken one after another. We get again three 
deflections of the same magnitude, 21 millims., 21 millims., 21 millims. (corr. 
24 millims., 24 millims., 24 millims. = 28H x 10~ 9 ampere = 24'0 x 1(T 6 volt). 
The investigation of the above system was then extended for longer periods to 
observe the influence of time upon the E.M.F. produced. 
Plate of June 5, 1903 (9 Curves) N3, Table I. 
The same system from June 3 was left short-circuited in the dark. The deflection 
m the dark was = 15 x 10~ 6 volt. Experimental data, see Plate N3, lable I. 
The deflections obtained at 26 centims. distance are : in (1) 36 millims. in 
(2) 35 millims. (corr. 37 millims.), in (3) 34 millims. (corr. 37 millims.), in 
(4) 33 millims. (corr. 36 millims.) = average 34'5 millims. = 40’55xl0 9 ampere = 
34'4xl0 -6 volt if not corrected, and = average 36’5 millims. = 42'8 x 10 9 ampere = 
36’4x 10“ 6 volt if corrected. (Intensity of the arc 12'5 right and left.) The deflec¬ 
tions obtained at 36 (7) centims. distance are: in (5) 17 millims., in (6) 157 millims., 
