420 



Popular Science Monthly 



The tea-wagon has now been adapted to 



the kitchen. The dinner dishes are all 



handled at the same time 



A Folding Service-Wagon 



A REAL labor-saver for the house- 

 keeper is a wheeled service-wagon. 

 A helpful new one has two oblong trays 

 with raised rims to prevent dishes from 

 sliding off. The upper one is approxi- 

 mately table height, the lower forms a 

 supplementary shelf beneath. In one 

 trip, breakfast or luncheon for the fam- 

 ily can be taken to the dining-room. 



The wagon is mounted upon two large 

 rubber-tired wheels with two small 

 nickel-plated ones in the rear. Placed be- 

 side the wife at the dining table, it can 

 be used without rising to exchange the 

 soiled dishes of the first course for the 

 fresh food of the second. After the meal 

 the soiled dishes are wheeled in one trip 

 to the kitchen. Rolled close to the sink, 

 the wagon receives the clean dishes as 

 dried and returns them to the china- 

 closet. When not in use it folds up com- 

 pactly and can be stored in a closet or 

 pantry. It is equally serviceable to re- 

 ceive clean ironed clothes and to distrib- 

 ute them over the house, or to serve as 

 a sewing: and mcndinsr table. 



A Dust-Collecting Window- Ventilator 



IN order that the air brought into a 

 room for ventilating purposes shall 

 be as free as possible from dust, a fil- 

 tering box has been developed, which, 

 attached to the window frame, allows 

 only cleansed air to enter. The box pro- 

 jects some distance beyond the outside 

 wall, so that the air currents will be suf- 

 ficiently strong to force their way 

 through the layers of filtering material, 

 into the room. 



Sheet metal walls are arranged in the 

 box in a zig-zag fashion, half of them 

 attached to the top and half to the bot- 

 tom ; the air must pass repeatedly up 

 and down. The walls are perforated at 

 their outer edges. A strip of cloth is 

 passed between the projecting edges of 

 the plates. Because of the staggered 

 arrangement of the plates, this ventilator 

 acts in the incidental capacity of a sound 

 muffler. When in position it occupies a 

 very small space; and the amount of air 

 admitted can be controlled by a small 

 sliding shutter. 



OF the two hundred and four cities 

 in the United States of over thirty 

 thousand inhabitants, one hundred and 

 fifty-five have municipally owned water- 

 supply systems, the total value of which 

 is one billion, seventy-one million dollars. 



A window ventilator which eliminates 

 dust as well as drafts 



If you want further information about the subjects which are taken up in 

 the Popular Science Monthly, write to our Readers' Service Department. We 

 v^^ill gladly furnish free of charge, names of manufacturers of devices described 

 and illustrated. 



