Chapter XII: Battery Charging Devices

The automatic plant most desirable--How an automobile
lighting and starting system works--How the same
results can be achieved in house lighting, by means
of automatic devices--Plants without automatic
regulation--Care necessary--The use of heating devices
on storage battery current--Portable batteries--An
electricity "route"--Automobile power for
lighting a few lamps 250

ILLUSTRATIONS

Even the tiny trout brook becomes a thing of utility as
well as of joy _Frontispiece_

Farm labor and materials built this crib and stone dam 17

Measuring a small stream with a weir 23

Efficient modern adaptations of the archaic undershot
and overshot water wheels 59

A direct-current dynamo or motor, showing details of
construction 92

Details of voltmeter or ammeter 128

Instantaneous photograph of high-pressure water jet being
quenched by buckets of a tangential wheel 194

A tangential wheel, and a dynamo keyed to the same
shaft--the ideal method for generating electricity 194

A rough-and-ready farm electric plant, supplying two
farms with light, heat and power; and a Ward
Leonard-type circuit breaker for charging storage
batteries 244