Page:Life in Motion.djvu/125

Rh frame carrying the glass plate are two binding screws at F, to one of which is attached an arm of brass 1, which can so move horizon-

tally as to establish metallic contact between the two binding screws marked 1, 2. By means of these screws the myograph is interposed in the circuit of a galvanic element and the primary coil I of an induction machine, and the brass arm is so placed as to connect