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20 Mar. 1876

Page 59
  



of free motion, then the vibrations of M will be copied by S; and the
sound resulting from the vibration of S wil be similar to that which
occasioned the vibration of M.
 In order to obtain the best available effect from S the
amplitude of the vibration of S should be as great as possible.
Hence the amplitude of the electrical undulations traversing the
circuit a b c d e f g h i k, should be large; or in other words, the
difference between the maximum and minimum of intensity in the
current should be as great as possible.
 By Ohm's Law we find that (I) the intensity of a current is equal
to (E) the electromotive force devided by (R) the resistance of the
circuit.
I=E/R
 The total resistance (R) of the circuit abcdefghik, (Fig I) consists of (B) the internal
resistance of the battery, (L) the resistance of the line and the
instruments upon it, and (W) the resistance of the water



 
Volume 1 
20 Mar. 1876

Page 59
  


