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access or treatment with the pans, cotton waste, bundles of rags, or 
the like may be saturated and thrown into these places. Everything 
should be done to avoid unnecessary delays and to facilitate the rapid 
exposure of the liquid. If the liquid is bought in large quantities, 
smaller receptacles may have to be provided for transferring i¢ to 
the pans. 
The exposure of the liquid——As many men may assist in the exposure 
as can work to advantage. Before the cans or drums are opened the 
men should be cautioned as to the nature of the liquid, the danger from 
fire, and the necessity for rapid work. If more than one floor is to be 
treated, begin at the bottom and work upward. Carefully close and 
fasten all windows and outer doors except one through which exit is 
to be made when the operation is completed. Pour out the liquid as 
rapidly as may be done, giving each pan about its predetermined 
amount, and then get out quickly. Close the door and keep it locked 
for twenty-four hours at least, longer if possible. The best plan usu- 
ally is to apply the liquid after work hours, but before dark, on Satur- 
day evening, and leave the building closed till the following Monday 
morning. 
Ventilation Doors and windows are then opened wide, at least one 
or two hours before it is time to resume work. The vapors disappear 
rapidly in the open air, and after an hour there will ordinarily be no 
danger in entering and but little trace of the disagreeable odor. Slight 
traces of the odor will probably linger in corners and places where the 
air does not move freely, but these gradually disappear. 
Precautions.—Attention has been called to the dangers from fire in 
the presence of carbon-bisulphid vapor in the air, but special reference 
should be made to it in connection with the treatment of buildings. It 
is customary to mention the danger of bringing a lighted cigar or any 
such thing into the presence of the fumes. The application should 
always be made in daylight, as no artificial light of any kind is allow- 
able. Even electric lights may not be used, since, when turning them 
on or off, there is always danger of producing a spark, which would 
prove disastrous if the vapor should be present in the proper propor- 
tion. Heated steam pipes constitute another danger to be guarded 
against, and they should be allowed to cool before the application is 
made. Electric fans must not be run, as they very frequently give 
off sparks. It is safer to have no heat of any kind in the building 
while the exposure is being made, and it is a matter of courtesy, as 
well as a precaution, to warn the owners of adjoining premises of the 
nature of the work being done, and the need for care if the vapors 
should penetrate to their rooms to any extent. It would be an added 
measure of safety to have a watchman to guard the premises from the 
time the application is made until ventilation is complete. 
