Popular science monthly . essity of inflatingtires to the proper this precaution is neglec-ted, the tire walls deflectmore than they should, andthe plies of which the tirecarcass is composed tend toseparate. This produces aweakening of the shoe andgreatly diminishes the lifeof the tire; a blow-out i-under these conditions. There is no excuse for this neglect ithe motorist is provided with tiycompact air-compressor outfit shown inaccompanying photograph. In tlie de-vice an electric motor ami pump arecombined in such small compass as tobe readily handled. The device weighsbut thirtee
Popular science monthly . essity of inflatingtires to the proper this precaution is neglec-ted, the tire walls deflectmore than they should, andthe plies of which the tirecarcass is composed tend toseparate. This produces aweakening of the shoe andgreatly diminishes the lifeof the tire; a blow-out i-under these conditions. There is no excuse for this neglect ithe motorist is provided with tiycompact air-compressor outfit shown inaccompanying photograph. In tlie de-vice an electric motor ami pump arecombined in such small compass as tobe readily handled. The device weighsbut thirteen i)()unds and can be pluggedinto any light-socket where the potentialis one huiidrid and ten volts, the almostuniversal iigiil ing current. Tlie currentmay be either alti-rnating or direct. This small outfit furnishes only coiclean air. It will pumj) up to one hun-dred pounds per sfjuare inch pressure,wliiih is sufficienl for ordinarv use. Sufficient hose is pro-vided to make quickconnections with anylight-socket at hand. Attach the air-compressor, which weighs only thirteen pounds, to an ordinary liglit socket and inflate your tires in a few minutes Popular Science Monthly 27 Keeping Things Cold in theAutomobile Refrigerator USlll) by the owners of alarge farm in Xi-wi^irl,Minn., to deliver milk, but-ter and kindred dairy pro-ducts within a radius oftwenty-five miles, the onethousand-five-hundred-pound truck shown in theaccompanyingpicture is inreality a refrigerator onwheels. It is equipped witha double-sheathed body,filled with sawdust between the innerand outer skins to prevent radiation. The interior is kept cool by means ofa conventional ice-box placed directlyunder the roof at the front end, whichis large enough to hold three hundredpounds of ice. The box is zinc-lined andis surrouniled on all sides by a layer ofcharcoal. It is drained by means of apipe extending down through the doublefloor to within a foot of the beneath the ice-box are three
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1872
