Page:Popular Science Monthly Volume 92.djvu/282

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��Popular Science Monthly

��Keeping the Radiator Water Warm During Freezing Weather

ANEW electric arrangement for pre- venting the water in automobile radiators from freezing, has been invented by Philip Apfel. An electric-heating element is attached to the radiator by- pass under the hood. The inser- tion of a plug con- nected with any lamp socket, in- sures the supply of current. A thermo- stat in the circuit turns on the cur- rent when the temperature falls below the freezing point. Should the heating plant of the garage go out during the night, your radiator water would be warm in the morning. In fact, you could ad- just the thermostat to keep the water at sixty degrees, so as always to be able to start the engine at once.

���The electric heater warms up the radiator whereupon the water begins to circulate

��Ventilating a Huge Building Covering Forty Acres

MANUFACTURERS are realizing, as never before, that light and air have a profound physical influence on the working man. Accordingly, old factory buildings, generally poorly ventilated, and practically windowless, are being sup- planted by the modern building with

��glass top and sides. The accompanying illustration gives a vivid idea of the new light and air principle of construction.

Covering forty acres, this giant building is as perfectly ventilated and lighted as if it had no walls or roof. The central por- tion of the roof is inverted like two great wings, whose slope deflects heated air to the outlets. The air comes in through low intakes and goes out through raised outlets in a way that causes natural changes. Chilling down- drafts are pre- vented by the truss roofs which force the ascending cur- rents strongly to- ward the outlets. Forced ventilation is not resorted to unless a building is so huge that the ordinary methods of natural ventila- tions can not be successfully ap- plied.

In the new sys- tem, light is abun- dantly and evenly diffused. There are no dark corners any- where about the premises. The under sides of the inverted roof are painted white, thereby utilizing by reflection, light which is lost with the ordinary roof design. This system was first designed for foun- dries and forge shops. The escape of heat is hastened by locating the cupolas, molds, furnaces and rolls under the outlets, so that heated air and gases go straight out.

���1 ... 1, ,, in. ,11; 1 ill < I i,l< 1 iulinil li^;lit ;iinl ;iir, ;inil two (itlu I s admit li<;lil ami di: This arranticincnt prevents any chilling down-dralts and insures a natural change oi air

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