BACTERIOLOGY IN A NUTSHELL. 



Some Lamps 

 Unsatisfactory. 



Ammonia 

 Will Remove 

 "dor. 



moist. It sometimes dries out, however, and 

 then water must be added. 



As so rtiany formaldehyde lamps are unre- 

 liable, some have found it more satisfactory to 

 use formalin solution, which contains forty per 

 cent of formaldehyde. The formalin is boiled 

 in a special apparatus and the gas passed into 

 the room to be fumigated by means of a tube 

 inserted through a key-hole or other small 

 opening. One gallon of the preparation will 

 supply sufficient gas to purify about twelve 

 hundred cubic feet of air space. 



THE SHEET METHOD OF FORMALDEHYDE 

 FUMIGATION. 



After packing all crevices in the room or 

 ward to be fumigated, and opening up all closet 

 doors, stand drawers, etc., place a dry sheet in a 

 pail and over it .pour one pint of liquid 

 formaldehyde for every one thousand (i,ooo) 

 cubic feet of air space. Quickly spread the 

 sheet over a line previously stretched across the 

 room. Close and pack the crevices around 

 door frames and transoms. It is asserted that 

 the liberation of the fumes all at once accom- 

 plishes the work of disinfection more thor- 

 oughly than when they are liberated slowly 

 and diluted with air. Liquid commercial 

 ammonia sprinkled about a room after formal- 

 dehyde fumigation will remove or neutralize 

 the odor remaining in the room. 

 140 



