846 



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. 



ALUMINUM CtolNS 

 RfRFrrnR \ CHARCOAL 

 nof Ml wrs / \ ABSORBING CARBON 



CALCIUM CHLORIDf\ DlOXIDf 

 DRltR ) i / SCREEN 



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. 



