lowatt generator would take care of these lights, with a 30
per cent overload (which is not excessive) for maximum service. The
above liberal allowance of lights may be cut in two, or four--or even
eight--and still throw a kerosene lamp in shadow. It all depends on
the number of lights one wants burning at one time; and the power of
the water wheel.

If the 36 carbon lights in the above table were replaced by 25 watt
tungsten lights, the saving in power would be 35 watts each, or 1,260
watts, nearly two electrical horsepower; while the added first cost
would be 14 cents a light, or $5.04. A generator of 2 kilowatt
capacity would take care of all these lights then, with 460 watts to
spare.

_Heating_

Electric heating and cooking is in its infancy, due to the prohibitive
cost of commercial current in our cities. Here the farmer has the
advantage again, with his cheap current.

For heating the house, it is calculated that 2 watts is required for
each cubic foot of air space in a room, during ordinary winter
weather. Thus, a room 10 x 12, and 8 feet high, would contain 960
cubic feet, and would require 1,820 watts energy to heat it in cold
weather. Five such rooms would require 9.1 kilowatts; and 10 such
rooms, or their equivalent, would require 18.2 kilowatts.

Electric heating devices are divided into two classes: (1) those which
can be used on lamp circuits, _and do not draw more than 660 watts
each_; and (2) those which draw more than 660, therefore _require
special wiring_. The capacity of these devices is approximately as
follows:

Lamp circuit devices: Watts
Electric iron 400 to 660
Toaster 350 to 660
Vacuum cleaner 200 to 400
Grill 400 to 660
Small water heater 400 to 660
Hot plates 400 to 660

Lamp circuit devices:
Coffee percolator 400 to 660
Chafing dish 400 to 660
Electric fan 100 to 250

Special circuit devices:
Hot water boiler heater 800 to 1,200
Small ovens 660 to 1,200
Range ovens 1,200 to 3,000
Range, hot plates 400 to 1,300
Radiators (small) 750 to 1,500
Radiators (large) 1,500 to 6,000

The only device in the above list which is conne