[PrevPage] [Next] [INDEX ]  Volume 1   October 1875   Page 9  [Source] [ NOTES ]
    a permanent magnet M3 vibrated over M.
    Circuit cMd-eM2f-c No sound audible from M 2 whichever pole of the magnet was applied to M.
  1. Battery introduced between c + f Circuit g-cMd-eM2f-h (See Fig3) M became a North pole. Permanent magnet M3 held horizontally, vibrations vertical. Upon vibrating the south pole of the magnet over M a loud sound was perceived at M2 ­ but the vibrations of the north pole over M produced no audible effect at M2.
  2. Battery reversed so as to make M a south pole (Fig3) Then the vibration of the north pole of the magnet over M occassioned at M2 but the south pole of the magnet produced no audible effect at M2.
  3. Magnet M3 held horizontally as in Fig 4. so that the vibrations across the pole of M instead of to + from
[PrevPage] [Next] [INDEX ]  Volume 1   October 1875   Page 9  [Source] [ NOTES ]