8 FARMERS’ BULLETIN 699. 
sacks, these gloves to be afterwards burned. The fact that the 
cyanid has a superficial resemblance to sugar adds to the danger of 
keeping it about the premises, and it is much better at once to bury 
deeply or throw down the sewer trap any left-over cyanid. 
SUMMARY OF METHOD. 
The general directions for treatment may be briefly summarized as 
follows: 
(1) Prepare tabular statement designating room capacity and 
amount of chemicals for each compartment and secure the chemicals 
and vessels for generating the gas. 
(2) Arrange for the opening of doors and windows from the out- 
side at the conclusion of the fumigation and close all registers, fire- 
places, and other openings. Do necessary calking and remove 
carpets and rugs and moist food material and any metallic objects 
which are likely to be tarnished. 
(3) Place the generating vessels in each room with a thick carpet- 
ing of old newspapers under each. 
(4) Break up the cyanid out of doors and place it in thin paper 
sacks containing charges suited to the amounts to be used. in the 
different rooms. 
(5) Measure into each of the generating jars the proper amount 
of water and afterwards add the acid slowly in the proper amount 
to each of the jars. 
(6) Take the cyanid in bags in a basket and place the bags con- 
taining the proper amount alongside of the generating jars in each 
room. 
(7) Start at the top of the house and place the cyanid gently, 
so as not to spatter, into each jar and quickly leave the room. As 
soon as the upper floor is finished go to the next lower, and pass in 
this manner from floor to floor until the basement is reached and exit 
is made through the lower door. If two persons work together in 
this operation they should both be on the same floor together, taking 
different rooms. 
(8) The following day, or after the completion of the fumigation, 
open the windows and doors from the outside and let the house 
ventilate for an hour before entering it. 
(9) After the house is thoroughly ventilated and the odor of the 
gas has disappeared, empty the jars in a safe place, preferably 
through the sewer trap, and wash them thoroughly and repeatedly 
before using them for any household purpose. 
WASHINGTON : GOVERNMENT PRINTING OFFICE : 1916 
