RESISTANCE BY A METHOD BASED ON THAT OF LORENZ. 
85 
R B 
Fig. 18. Simple diagram of circuit. 
R, resistance to be measured ; B, battery; G, galvanometer. 
i « i i 
A, ammeter; B, battery; C, brush selector switch ; D, resistance in galvanometer circuit; E, earthed 
point on circuit ; G, galvanometer; M, multiple commutator and plug board; R, resistance to be 
measured; S, reversing switch. 
