Page:Popular Science Monthly Volume 88.djvu/132

 104

Electric Heater Resembles Desk Telephone

AMONG the new electric heatin^^ de- vices being brought out is one which looks like a desk telephone. It consists of a round, transmitter-like de- vice, about six inches in diameter, con- taining the usual electric coils, and with a cage in front. This is mounted on the side near the top of a standard such as is used for the electric fan.

The heater is supplied with eight feet of cord so that it may be moved around and placed either on the floor or on a table. It is made in two styles ; one having two heating units, and the other ha^■ing but one. The latter, of course, is less expensive to buy and uses less current. The double unit one, however, gives off sufficient heat to warm a room of considerable size. This heater can be used not only to heat a room but can be placcfl in such a position that it will warm the feet onl\\

Adapting Tire Inflation to the Load

CALIPERS have been devised for measuring air pressure in automobile tires in relation to the load carried. A touring party before starting on a trip may use the new tool to establish correct

��Popular Science Monthly

���This new tool, with i t s corresponding tables, practically eliminates the dan- ger of blowouts due to over-inflation with a heavy load. The driver with his scale can quickly find how wide his tires should be to ride properly, and with this scale can find how much be- low or above the proper pressure they are

����A desk heater which radiates its comfort

to the spot where it is wanted, and is still

an attractive bit of furniture

pressure in the tires for the load of peo- ple and trunks, and by keeping this pressure constant tires may be greatly economized. The device is simple, small and compact, and may be used in a few sec- onds. The tool has a size scale and a load scale. The size of the tire at the top is measured on the size scale, and the slide moved along to the same size on the load scale. The tool is then placed over the bottom of the wheel, and if it fits easily over the tire the pressure is correct. If it does not fit, the tire is inflated or deflated to the correct point.

Blowouts can usually be traced to faulty in- flation, so this tool can be expected to pay for itself.

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