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Page:Popular Science Monthly Volume 90.djvu/862

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��Popular Science Monthly

���The air supplied to the patient is me- chanically cleansed by the filters, made chemically clean by the action of the rays from the electric light, and then carried to the patients' lungs through the mouth

Apparatus for Puri- fying and Medi- cating Air

IN brpnchial and throat affections and directly after suffoca- tion by gas, prepared air is of the greatest value, especially if it is medicated. The appa- ratus illustrated makes it possible for a gas- stricken victim to be re- stored to consciousness in a minimum of time.

A coarse mesh at the point of entry contains a packing of lump char- coal which removes gases, excess moisture and solid matter. Solid ralcium chloride thor- oughly dries the air and then a layer of cotton wool filters it and pre- vents the solids from falling into the reflector chamber through the holes surrounding the reflector rim.

The air comes through these holes and is ex-

��posed to the glare of a tungsten lamp intensified by a bright metal reflector. The action of the rays combined with the heat of the lamp kills the germs and organic matter remaining in the air. A suction fan draws the purified air from the reflector chamber and dis- poses of any remaining particles by the centrifugal throw of its blades. This tends to push the air along its path, relieving the patient of much of the labor of drawing the air through the apparatus. In the final stage, the air passes through a tube into a saline or oil solution in a bottle, from which it is passed to the patient, through another tube.



����The screens may be rolled up like a shade on cleaning days and left in their cases when the season is over

��An Improvement

on an Old Idea for

Window Screens

ESLE V. MER- CER has adapt- ed the principle of the ordinary window shade roller to the mosquito screen. The roller used is of much larger diameter than that of a window shade, and it is fitted with a much more powerful spring. Moreover, it is entirely enclosed in a metal casing, mounted directly outside the win- dow. The screening it- self is reinforced by thin- edge strips of flexible metal.

When the screen is pulled down it is fast- ened in place by a catch on the bottom window- sill. When the cleaning day comes around, in- stead of having to re- move each screen from its fastenings in order to get at the windows, it is necessary only to roll up each one in its turn. When the mos- quito and fly season is over the screens need not be taken down and stored. They may be left rolled up in the cases.

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