THE DYNAMO; WHAT IT DOES, AND HOW Electricity compared to the heat and light of the Sun--The simple dynamo--The amount of electric energy a dynamo will generate--The modern dynamo--Measuring power in terms of electricity--The volt--The ampere--The ohm--The watt and the kilowatt--Ohm's Law of the electric circuit, and some examples of its application--Direct current, and alternating current--Three types of direct-current dynamos: series, shunt, and compound 89 CHAPTER VI WHAT SIZE PLANT TO INSTALL The farmer's wife his partner--Little and big plants--Limiting factors--Fluctuations in water supply--The average plant--The actual plant--Amount of current required for various operations--Standard voltage--A specimen allowance for electric light--Heating and cooking by electricity--Electric power: the electric motor 121 CHAPTER VII TRANSMISSION LINES Copper wire--Setting of poles--Loss of power in transmission--Ohm's Law and examples of how it is used in figuring size of wire--Copper-wire tables--Examples of transmission lines--When to use high voltages--Over-compounding a dynamo to overcome transmission loss 153 CHAPTER VIII WIRING THE HOUSE The insurance code--Different kinds of wiring described--Wooden moulding cheap and effective--The distributing panel--Branch circuits--Protecting the circuits--The use of porcelain tubes and other insulating devices--Putting up chandeliers and wall-brackets--"Multiple" connections--How to connect a wall switch--Special wiring required for heat and power circuits--Knob and cleat wiring, its advantages and disadvantages 172 CHAPTER IX THE ELECTRIC PLANT AT WORK Direct-connected generating sets--Belt drive--The switchboard--Governors and voltage regulators--Methods of achieving constant pressure at all loads: Over-compounding the dynamo; A system of resistances (a home-made electric radiator); Regulating voltage by means of the rheostat--Automatic devices--Putting the plant in operation 192 PART III GASOLINE ENGINES, WINDMILLS, ETC. THE STORAGE BATTERIES CHAPTER X GASOLINE ENGINE PLANTS The standard voltage set--Two-cycle and four-cycle gasoline engines--Horsepower, and fuel consumption--Efficiency of small engines and generators--Cost of operating a one-kilowatt plant 217 CHAPTER XI THE STORAGE BATTERY What a storage battery does--The lead battery and the Edison battery--Economy of tungsten lamps for storage batteries--The low-voltage battery for electric light--How to figure the capacity of a battery--Table of light requirements for a farm house--Watt-hours and lamp-hours--The cost of storage battery current--How to charge a storage battery--Care of storage batteries 229