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excuse, other than severe illness in a room, should be taken as exempting any 
part of the house from fumigation except the sick room, which should be 
fumigated as soon as possible. 
After the allotted time necessary to thoroughly complete the fumigation is 
up the doors are opened and the floor swept. Some of the mosquitoes may 
be only stupefied, and it is necessary that they be all burnt or otherwise 
destroyed. 
After the patient is convalescent, or after death, the patient’s room is to 
be fumigated. 
Materials and Apparatus to be used in Fumigation, and precautions to be 
taken. — No guesses at the amount of material to be used are to be made, but 
the room should be carefully measured and materials proportioned to cubic 
capacity as follows (small closets and wardrobes to be opened) : — 
Py rethrum powder. — 3 lbs. to 1,000 cubic feet applied for three hours, 
and it is better that the 3 lbs. be divided amongst three pots than that all the 
powder be put in one pot. The pot to be placed in pans containing a little 
water. Pyrethrum powder is used for rooms close to the sick patient, as the 
fumes which might escape from sulphur fumigation are irritating. 
Pyrethrum powder is also used in cases where brass work, pianos, 
telephones, instruments, &c., are present. 
Sulphur. — 2 lbs. to 1,000 cubic feet. The pots containing the sulphur 
are to be placed in pans containing one inch of water. The sulphur is to be 
started by alcohol, and care must be taken to see that it is well alight. 
Duration three hours. Brasswork and instruments are liable to injury, they 
should, therefore, be removed. 
Camphor and Carbolic Acid— The mixture consists of equal parts camphor 
and crystallised carbolic acid dissolved by gentle heat. It is an exceedingly 
good fumigator, does not injure furniture, clothes or brass work, the odour is 
pleasant and smells of camphor. A room has a refreshing smell after its use. 
Four ounces are vapourised per 1,000 cubic feet for two hours. I he 
material is placed in an open pan placed over a spirit or petroleum lamp, white 
vapour is given off. 
To test the efficiency of the fumigation, it is very useful to enclose some 
twenty or more mosquitoes in a cigar or other small box covered on one side 
with muslin. The box is placed on the floor, and the mosquitoes should be 
dead at the end of the fumigation. They should be kept, however, to see if 
they revive. 
Avoid risk of setting fire to the premises by using care and foresight. 
Fumigation of Adjacent Houses and General Fumigation. — It is most 
important that the houses in the vicinity of the house in which a case of yellow 
fever is declared should be fumigated at once. In Belize this summer powers 
were sought to compel owners, or occupiers of houses, building lots, outhouses 
and premises situate within 100 yards of the infected house or premises to 
destroy all mosquitoes, larva;, pupae, & c. I am strongly of opinion that this is 
not sufficient. The householder cannot as a rule carry out fumigation as described 
above, it can only be carried out effectively by the proper staff which should be 
that of the Medical Officer of Health. The result of the householder carrying 
out fumigation is that the majority of the mosquitoes are not killed, that cases 
