Handy man's workshop and laboratory . ifferent shapes and sizes which are made with this importantfeature. To prevent chafing of the cord, unscrew this winding key andslip on, back of it, a thick cardboard washer. Then connect thekey and wire lever with a piece of cord and the contrivance 19ready for operation, ftfter setting the clock, the cord should bewound onto the key in winding the alarm. Then the chains are HANDY MAN S WORKSHOP AND LABORATORY 349 hung in place on the lever. When the alarm goes off the leverturns on its pivot, releasing the chains and permitting the usualweight to drop a
Handy man's workshop and laboratory . ifferent shapes and sizes which are made with this importantfeature. To prevent chafing of the cord, unscrew this winding key andslip on, back of it, a thick cardboard washer. Then connect thekey and wire lever with a piece of cord and the contrivance 19ready for operation, ftfter setting the clock, the cord should bewound onto the key in winding the alarm. Then the chains are HANDY MAN S WORKSHOP AND LABORATORY 349 hung in place on the lever. When the alarm goes off the leverturns on its pivot, releasing the chains and permitting the usualweight to drop and thereby open the drafts and damper. If thefurnace is not arranged with a weight for operating the draftthe chains may be connected directly to the key by a cord whichwill be wound up on the key as the alarm goes off.—98 MILK TESTING WITHOUT APPARATUS The following process for the detection of added water or ofskimmed milk in ordinary milk is more accurate than the sim-ple use of the lactodensimeter without the creamometer Fig. 292—Simple method of testing milk I 350 HANDY MANS WORKSHOP AND LABORATORY The whole test can be made in five minutes. The result doesnot show whether the adulteration consists in the addition ofwater or in the subtraction of cream, but as a rule this matterslittle to the consumer. What he wants to know is whether or nothe has what he has paid for. The suspected milk is stirred with a spoon, in order to dis-seminate into the whole liquid the cream which may have cometo the surface. Then one volume of milk is poured into fiftyvolumes of water. (One fluid ounce to two and a half pints.)A candle is lighted in a dark room. The experimenter takes anordinary drinking glass with a tolerably flat and even bottom,and holds it right above the candle, at a distance of about onefoot from it, so as to be able to see the flame of the candle throughthe bottom of the glass. He then pours slowly the diluted milkinto the glass. (See the accompanying figure.)
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectworkshoprecipes
