Fig. 31a. A CHART OF ELECTRICAL SYMBOLS

[Large illustration]

Fig. 31b. A CHART OF ELECTRICAL SYMBOLS

[Large illustration]

How to Read Electrical Diagrams.—From the plates of symbols given at A and B in Fig. 31, you will see that the symbol for a battery is a pair of parallel lines as shown above, that the symbol for a motor is made in this fashion:

and that a switch is made like this: