394 



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. 



as 



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 



