the Discharge of a Leyden Jar. 255 
age duration of the mixed phenomenon, ‘the determination of 
the duration of the two constituents was more troublesome. 
eeoereene eves 
Striking distance 2 millimeters. —Only a single discharge was 
generated, and the same was true up to the maximum striking 
distance, which in this experiment was 2°6 millimeters. 
Form and duration of the discharges of the larger jar with plati- 
um points as electrodes. 
The length of the simple induction sparks was 48° millimeters. 
Striking distance 1 millimeter—The form was the same as 
shown in fig. 4; the number, however, varied commonly from 2 
to 4, rarely reaching 5. 
Total duration with 2 discharges,.......--- 0020 sec. 
= ‘3 “ 4 er copes Pee 0064 “ 
The average interval was ......-.-+++-++: 0020 “ 
Striking distance 2 millimeters.—The form was still the same, 
with two, three and rarely four discharges. 
Total duration with 2 discharges,....-.-+-- ‘0027 sec. 
‘ ee BS Bel se 0061 « 
The average interval waS......-.+--e+eees 0028 * 
Striking distance 8 millimeters.—Two and seldom three dis- 
charges, 
Total duration with 2 discharges,......---- 0040 sec. 
Striking distance 4 millimeters.—Generally only one discharge ; 
rarely two. In one disc ex riment the interval between the 
two discharges was doubtfully determined as ‘0036 sec. 
Striking distance 5 millimeters.—Only a single discharge— 
about one spark in 20 was double. 
Striving distance 6 millimeters.—Using the revolving dise, I 
looked for a long time and was not able to detect any double 
discharges, so that from 6 millimeters up to 11 millimeters, 
which was the maximum striking distance, the discharges 
Proved to be simple, instantaneous sparks. 
these experiments that 
panied by a corre- 
