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Fumigating Oak

Oak can be darkened permanently by exposing it to the fumes of ammonia gas. Small articles made of the wood may be enclosed in a large box with well-fitting lid, along with saucers into which liquid ammonia – the gas dissolved in water – has been poured. The joint between be: and lid should be…

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THE CARE AND UPKEEP OF A PRIVATE ELECTRIC LIGHTING PLANT

THE four main items of a private generating plant are: (1) the engine; (2) the dynamo; (3) the switchboard; (4) the battery. As regards the engine. If the makers directions about cleaning, lubrication and the occasional examination of certain parts are followed out, this should give very little trouble. The governor and fuel pump, when…

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WATTS AND UNITS

THE Board of Trade electrical unit is the kilowatt-hour, which signifies a consumption of energy at the rate of 1,000 watts in an hour, or at a smaller rate for a corresponding longer time. The companys meter registers the units as they are consumed, and the householder pays accordingly. A 40-watt lamp will run =…

Energy Crisis: Where’s The Energy Coming From?
Environment

Energy Crisis: Where’s The Energy Coming From?

World energy consumption is increasing by about 4% a year, or doubling every 15 years. Petroleum consumption is doubling every 10 years or so. Traditional sources of this energy cannot maintain this rate for very much longer. We shall quite simply use up all our available resources. The argument tends to hinge, therefore, around the…