Page:Popular Science Monthly Volume 91.djvu/410

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��Popular Science Monthly

��A Heel Which Will Wear Evenly All Around

NINE hundred and ninety-nine persons out of a thousand wear down the heels of their shoes at the sides. The result — weak ankles and a crooked and slothful step. It took a real genius to think of the clever method of correcting this which is illustrated in the accompanying photograph. The rotating heel! All you need do when your heel becomes side-worn is to turn it around and let the heei wear down on the side opposite! But don't wait until it is very lopsided.

A short but heavy bolt, screwing through thread- ed plates into the heel and into the shoe, holds the heel firmly on.

��car is a ventilator.

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���If your heel becomes too much worn on one side, just turn it around and wear it down on the other to keep an even surface

��At Last! A Refrigerator Car That Really Works

WERE it not for refrigerator cars, we could not tickle our palates with out-of-season delicacies and would have to satisfy ourselves with the fruit and vege- tables that grow in our own particular sec- tions of the country, leaving California fruits for the Californians and Florida products for the southerners. And yet the producers and wholesalers claim that re- frigerator cars are not at all what they ought to be.

��No wonder, then, that a new type of car has been designed to meet the requirements of transportation and weather eonditions, which promises to eliminate much of the loss now incurred. This new type of combination refrigerator and In construction it is the same any ordinary refrigerator car, except that in it a live-air space is provided at the sides, ends, floor and ceiling. By means of this live-air space a wall of refrigerated air completely surrounds the interior of the car.

The ice box is located in the center of the car directly under the roof, instead of in the ends of the car, which makes it possible to carry twenty per cent more freight. It has three open- ings into the car, one at each end and one in the center. Entering the cen- ter opening, the cold air falls to the floor and is spread out over the car towards each end. The warm air rises and enters the ice box through a netting at the end, where it is cooled and again passes through the opening in the center of the ice box into the car chamber. The cold air is also drawn into the live-air space through the opening in the sides and ends of the car by the rising warm air which passes through this space to the ice box, where it is again cooled and discharged through the middle opening of the ice box. This has a drying effect and gives the proper refrigeration.

���The warm air enters the ice chamber through a netting at the end of the chamber. . After it has been cooled by passing over the ice it passes downward through the opening in the center of the ice chamber into the car. As it gradually loses its cold it rises to the top again

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