[PrevPage] [Next] [INDEX ]  Volume 1   22 Feb. 1876    Page 24  [Source] [ NOTES ]
  1. Experiments to test the influence of the battery in affecting the pitch of S (Fig 6).
    The spring S (Fig 13) was plucked by the finger, and the pitch observed was called do (Fig 15). The circuit was then completed as in Fig 13 and the spring plucked again ­ the difference of the pitch being noted. Battery power was then introduced into the circuit and the pitch noted.

    Results (see Fig 15)

      (a) no circuit --------------- sound = do
(b) circuit but no battery --- sound = do (1/4 b?)
(c) one cell of battery ------ sound = do b (half between d + t)
(d) two cells ---------------- sound = te.
(e) three cells -------------- sound = te (1/2 b?)
  2. Double circuit as in Fig 14.

    Results (see Fig 15)

          Primary circ.    Secondary circ.   Poles     Pitch of sounds
(f) one cell          no battery       ----           d
(g) two cells         no battery       ----           d
(h) three cells       no battery       ----           d
(i) one cell          one cell         n n            d(b)
(j) one cell          one cell         n s            d(b)
[PrevPage] [Next] [INDEX ]  Volume 1   22 Feb. 1876    Page 24  [Source] [ NOTES ]