374 



Popular Science Monthly 



The tank holds nearly two thousand gallons of water and is designed to withstand a pressure 

 of forty-two pounds to the square inch. On account of the high pressure less water is needed 



New York's Wonderful Street-Sweeper 

 and High-Pressure Flusher 



THE New York city street cleaning 

 department, tired of waiting for in- 

 ventors to turn out an efficient cleaning 

 machine, put its own electrical and me- 

 chanical engineers to work on designs. 

 The new cleaner they devised is almost 

 completely electric. I Every wheel is turned 

 by motor power. The current is generated 

 by a dynamo which is driven by the 

 gasoline engine under the hood. Two 

 motors turn the driving wheels, one the 

 broom, another the atomizer pump and a 

 third the flushing pump. 



The driver of the truck handles his 

 gasoline engine and steers the machine, all 

 other work being done by the flusher who 

 . has a seat on the rear of the 

 trailer, at which point all the 

 controllers for the various de- 

 vices are located. 



The machine is capable of 

 cleaning from one hundred to one 

 hundred and twenty-five thou- 

 sand square yards of paving per 

 day. It can scrub a street which 

 is thirty feet from curb to curb 

 in two trips. As it moves at 

 a speed of from nine to nine cmI"'^ 

 and a half miles an hour it 

 can clean fifty miles of street 

 in a single ten-hour night. 



Utilizing the pressure system 

 of flushing makes it possible to 

 clean the streets as carefully as 

 a ball room floor. The tank 

 holds 1675 gallons of water. 



FROM 

 application 



Your Feet Are Cold? Then Use 

 the Foot-Radiator 



West Virginia comes a new 

 for hot-water and steam 

 heating. The inventor has designed a boot 

 on the style of a foot-radiator. It consists 

 of an inner water-tight stocking of rubber 

 and another stocking surrounding it. The 

 space between the two is sealed from the 

 outside except for two openings, one 

 through which hot water or steam is to 

 be supplied to fill the opening, and the 

 other through which the cooled water and 

 the used steam are to be ejected. 



There are two ways of supplying the hot 

 water or steam. One is to attach a hose to 

 each opening and connect it with a source 

 of hot water in the same way that 

 boilers are connected in a heating 

 system ; the other is to fill it as you 

 would a hot water bottle. The 

 inventor makes the claim that the 

 device may be used by attaching it 

 to the exhaust of an automobile 

 engine. Just how the inventor in- 

 tends to carry off the exhaust gases 

 NIPPLE after they have been admitted to the 

 boot he does not say. Evidently 

 the thought in his mind was 

 to provide an outlet for the 

 purpose on the outer side 

 of the boot, or through the 

 ejector hose. 



Some kind of a control 

 arrangement would have to 

 be provided, also, to pre- 

 vent the boot from becom- 

 ing uncomfortably hot. 



WATER PROOn 

 NNER 

 STOCMNS 



FLANNEL 

 LININ6' 



PERFORATIONS AND TUBING 

 FOR CIRCULATION 



The radiator boot is con- 

 nected to a hot water 

 supply in the same way 

 as is a steam radiator 



