This section is from the book "Amateur Work Magazine Vol6". Also available from Amazon: Amateur Work.
Most of the obelisks in existence were taken from the quarries of Syene in Upper Egypt, and are of red granite or syenite They are the monolyths of the ancients. Some of them measure over 100 feet, and to extract a vast piece of stone of this size meant great care and toil. At Syene an unfinished obelisk shows the way they were cut. The obelisk was cut out of the solid rock and polished on three sides before the fourth was disengaged, A deep Assure was then made along the under side, where the separation was to be made, and wooden wedges introduced into it, which being frequently moistened, expanded and gradually effected the separation without any
The so-called sulphur springs, those whose waters are of bad taste and odor, are not really sulphur springs, they getting their odor and taste from the hydrogen sulphide contained therein.
To keep machinery from rusting, take one ounce of camphor, dissolve in one pound of melted lard, take off the scum which forms and mix in as much powdered plumbago or black-lead as will give it an iron color. Clean the machinery and smear it with this mixture. After 24 hours rub clean with soft linen cloth. It will keep clean for months under ordinary circumstances.
Crude Oil Fuel is being used in the boiler plant of the Eagle Flour Mills at Newton, Mass., at a cost comparing very favorably with that of coal. About 170 bbls. of oil are burned per week at a cost of from 3.99 to 4.69 cents per barrel of fiour manufactured. The fuel cost when using coal averaged 4.6 cents per barrel of flour output, not taking account of the labor cost of handling the coal and stoking. The burner used is the Hammel crude oil burner, which uses steam for atomizing the liquid fuel, and no change was made in the furnace except to cover the grates tightly at the rear with bricks and sand, and at the front with half bricks laid loose with 1 in. air spaces; at the front close to the furnace doors an 8xl2-in. air opening was left clear on either side. Combustion is absolutely smokeless when the burner is properly regulated.
Paraffin softens and becomes very pliable at many degrees below its melting point. It burns with a pure and brilliant white flame when supplied with sufficient air for complete combustion. Candles made entirely of paraffine are not suitable; but by mixing stearic acid or vegetable wax, etc., this defect may be overcome.