Chapter IX

.--DYNAMOS AND ELECTRIC MOTORS.

A simple dynamo--Continuous-current dynamos--Multipolar dynamos--Exciting the field magnets--Alternating current dynamos--The transmission of power--The electric motor--Electric lighting--The incandescent lamp--Arc lamps--"Series" and "parallel" arrangement of lamps--Current for electric lamps--Electroplating 159

## Chapter X .--RAILWAY BRAKES.

The Vacuum Automatic brake--The Westinghouse air-brake 187

##