Keywords: Life in Motion Fig 18.png en Fig 18 ”Arrangement of apparatus for demonstrating Faradic currents b galvanic element; p primary and s secondary coil; g galvanometer In the experiment a reflecting Thomson galvanometer was used Life in Motion or Muscle and Nervehttps //archive org/details/b21929786 John Gray McKendrick 1892 1926 Life in Motion book Electric switches |