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.

170 MESSRS GLAZEBROOK AND LODGE, EXPERIMENTS ON THE OSCILLATORY
TABLE V.
k I
Case i. Case ii. Case iii.
Coil as in Fig. 3 Half-coil used Coil as in Fig. 5
as in Fig. 4
2 ~245 -287
5 -458 -558
5-5 -474.574
10-5 -659 -784
30-5 1 - 152 1 - -076
190 1- 028 1- 007 1- 014
3000 1- '002 1- -0005 1- '001
58'5 1- 081 1 - 021 1- 040
Again it appears from an approximate calculation founded on the measurements of
the coil that the capacity of any one layer on those adjoining it is large, it may even
be as great as 600 cm. It is therefore desirable to investigate if possible what effect
this has on the formula for the frequency.
We may perhaps represent this by supposing the coil to consist of a series of
3 Q3,
-Q.I ~ xys.
v4-^ ---- ^ ^ y _ _v
-Q4
Qn-1
FiG. 7.
loops without capacity with a series of parallel plates attached at the centre of each
loop.
L'c= V1- V2,
L' (-f'2) = y2- 13,