8 REMEDIES AND PREVENTIVES AGAINST MOSQUITOES. 
The powder may be placed upon a metal screen above the chimney of 
a kerosene lamp, with the result that the vapor of the volatile oil will 
be dissipated. This is said to be very effective. It is economical in 
powder, and the odor is slight. Another method of burning the 
powder is to puff it from an insufflator into a burning gas jet. In 
New Orleans it has been found that in order to thoroughly clear 
houses of mosquitoes pyrethrum must be burned at the rate of nearly 
1 pound of powder to every 1,000 cubic feet of space. 
MIMMS CULICIDE. 
This mixture is made of equal parts by weight of carbolic acid 
crystals and gum camphor. The acid crystals are melted over a 
gentle heat and poured slowly over the gum, resulting in the absorp- 
tion of the camphor and a final clear, somewhat volatile liquid with 
an agreeable odor. This liquid is permanent, and may be kept for 
some time in tight jars. Volatilize 3 ounces of this mixture over a 
lamp of some kind for every 1,000 cubic feet of space. A simple 
apparatus for doing this may be made from a section of stovepipe 
cut so as to have three legs and an outlet for draft, an alcohol lamp 
beneath and a flat-bottom basin on top. The substance is inflam- 
mable, but the vapor is not explosive. The vapor is not dangerous 
to human life except when very dense, but it produces a headache if 
too freely breathed. Rooms to~be fumigated should be made as 
nearly air-tight as possible. 
SULPHUR DIOXID. 
Burning of sulphur, or lump sulphur, in a small pot, at the rate 
of 2 pounds of sulphur for each 1,000 cubic feet of space, is efficient 
against mosquitoes where fumigation in the case of possible disease- 
bearing mosquitoes is desired. 
OTHER FUMIGANTS. 
According to Dr. John B. Smith, powdered jimson weed (Datura 
stramonium) can be burned to advantage in houses. He recommends 
8 ounces to fumigate 1,000 cubic feet of space. He states that it 
should be made up by the druggist into an amount with niter or salt- 
peter 1 part to 3 of Datura, so as to burn more freely. He states that 
the fumes are not poisonous to human beings, are not injurious to 
fabrics or to metals, and can be used with entire safety. He sug- 
gests that it be burned in a tin pan or on a shovel. 
The burning of dried orange peel has been recommended as a de- 
terrent against mosquitoes by a Japanese physician. 
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