4 
such a case a householder must consult his neighbors. In isolated 
houses, however, with the precautions indicated, the operation will 
be a safe one. The fact that Mr. Kirkland observed that English 
sparrows resting on the ridge of one of his houses were killed by the 
ascending fumes indicates, also, that where the house to be operated 
upon immediately adjoins a higher structure to which the gas may 
possibly gain entrance, there may be some danger to the occupants 
of the higher structure. 
A PRACTICAL ILLUSTRATION. 
Subsequent to the preparation of the foregoing portion of this cir- 
cular a large dwelling house in Washington, D. C., was fumigated under 
the direction of Mr. Marlatt, and the following notes, based on this 
experience, are appended to more fully illustrate the fumigation process. 
The house was a fairly good-sized one, and all five floors, counting the 
garret and the basement, were treated, the space representing nearly 
40,000 cubic feet and requiring the use of some 25 pounds of cyanide 
and a corresponding quantity of acid. ; 
The cubie contents of each room on each floor were carefully com- 
puted, and a tabular statement, given below, was prepared designating 
for each floor and the different rooms the capacity and the amount of 
water, acid, and cyanide needed. 
Table designating rooms, capacity, and amounts of chemicals. 








Floor. Room. | Cubic feet.| Water. Acid. Cyanide. 
Fl. 02. BUNOZ: Avd. oz. 
HOULth Mee eters ee AG arrebe a2 at eo eee *7 000 140 70 70 
Mir eee ees. Rront-c--22 ee ee > ‘2.800 | 56 28 | 28 
Middle. 2.022 = eee 1,400 28 14 14 
Back. a es | 2,200 | 44 | 22 22 
SeCcondteeeesn = —- ee es BrOnte =e ese *5 500 110 ‘DD | 55 
Middle 2: 2232256 -22 = 2,200 44 22 22 
BaG@ky ose oee see 2,000 40 20 20 
TITS beer cer ‘Seah | 22 Niel (oy) epee eg een *4 400 88 44 | 44 
Middle: ee 2,400 48 24 | 24 
Dinin S22 Seo | 2,900 58 29 29 
BasSementwecnss ss! esse oe Servants yess see 1,200 24 12, 12 
Fla et See es 2,000 40 20 20 
Kitchen ae ee 1,800 | 36 18 18 
ETN bat eee a nc eee |e a Oe os ee 39,800 | 756 378 378 

* The charges for these rooms were halved and set off in two vessels. 
The rooms were prepared for treatment by seeing that all windows 
were closed and that the doors and windows of the ground floor 
were left unlocked or unfastened, so that they could be opened from 
without. The fireplaces in the different rooms were stuffed with 
paper and the registers were all closed. The carpets and rugs, 
where possible, were cleared away from the floor to prevent their 
being burned should the acid spatter out or boil over, and a large 
porcelain wash-basin or a porcelain waste jar was put in each room, 
