Bell Notebooks Vol.1 p11

Volume 1

October 1875

Page 11

Magnet held horizontally Vibrations lateral.

(See Fig 4)

(e)   N S
    N'S'      Faintly audible at R.
(f)   N S
    S'N'      Inaudible at R.

(g)   S N
    N'S'      Inaudible at R.

(h)   S N
    S'N'      Faintly audible at R

(i) N S
    S'N'      Inaudible at R.

(j) N S
    N'S'      Inaudible at R.

Magnet held vertically. vibrations lateral

(See Fig 5)

(k)   N S
    N'S'      Inaudible
(l)   N S
    S'N'      Inaudible

(m)   S N
    N'S'      Inaudible

(n)   S N
    S'N'      Inaudible

(o) N S
    S'N'      Inaudible

(p) N S
    N'S'      Inaudible

All the above exp. were repeated but in no case was any sound audible from M2 when the finger was laid upon S' or when S' was removed (Figs 1.2.3.4.5.)

Copied Feb 21st 1876
M.G.H.

Volume 1

October 1875

Page 11