Memoirs presented to the Cambridge philosophical society on the occasion of the jubilee of Sir George Gabriel Stokes, bart., Hon. LL. D., Hon. SC. D., Lucasian professor.

DISCHARGE OF AN AIR CONDENSER, WITH A DETERMINATION OF "v." 193
As an example of a plate in which the whole coil was used the record for plate R
is given in Table XI. It will be seen that the means for the separate circles differ
by 7' in the case in which all the sparks are considered, and by 9' when only the
central swings are dealt with; the difference between the two means is 19'.
If we take as the length of wave 26 15', the frequency is 64 x 360/26'25 or 878
oscillations per second.
It is not necessary to give the results of the other plates in such full detail.
The following Table summarizes them sufficiently. In each case the central sparks
only are included.
TABLE XII.
Complete Coil A + B.
Plate K L O R T
Number of sparks 11 13 9 15 22
Length of wave 26~ 14' 26~ 9' 26~ 16' 26~ 15' 26~ 5'
Mean length of wave 26~ 11'.
Coil A.
Plate G H M N S
Number of sparks 20 28 7 27 33
Length of wave 14~ 14' 14~ 32' 14~ 25' 14~ 18' 14~ 19'
Mean length of wave 140 20'.
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