COLD-STORAGE EXPERIMENTS, 1906-7. PAD 
wide piece of heavy linoleum was used, and the framework screwed 
down firmly all around, also using felt strips to insure tightness. 
This made a very tight box which proved quite satisfactory for the 
work. The necessary potassium cyanid was divided into four parts, 
one of which was used near each corner of the fumigatorium. 
To provide for removal of gas at end of period of exposure a 
large canvas box, 12 by 12 inches square, extended from a slide 
door opening at the rear of the fumigatorium to an adjacent window. 
A large electric fan was placed inside the fumigatorium and operated 
from the outside, forcing the air toward the outlet. With this 
arrangement it required about twenty minutes to sufficiently clear 
the box of gas to permit of opening it. The whole outfit was placed 
in one of the cold-storage rooms of a local cold-storage plant, in 
which the temperature was uniformly 30° F. This furnished oppor- 
tunity to determine the effectiveness of the gas at a comparatively 
low temperature and under conditions which might become neces~ 
sary in the actual fumigation of fruit in cold-storage houses. 
Packages Nos. 60 to 67 were fumigated January 29 and examined 
for condition of scales on February 21. Nos. 68 to 70 were fumi-~ 
gated February 25 and examined March 15. .These latter were made 
to repeat some of the earlier tests, to secure corroborative data. 
The fruit used was of the Baldwin variety and had been held in the 
same cold-storage room since October, and undisturbed in the original 
barrels, except that used in boxes which was packed from one of the 
barrels of this lot. In Table IX the features of the work are pre- 
sented more in detail: 
Taste 1X.—E fect of funugation with hydrocyanic-acid gas on scales and fruit at cold~ 
storage temperature, 30° F. 
Rate at = 
E i- which Length Tea 
eee Variety of Kind of package potas- | of ae aeaiGS | Effect on Effect on 
Now| apple. (fruit dry). sium posure.| exam- seales. fruit. 
cyanid ad 
| was used. Be 
Gr. per 
cu.ft. | Hours. 
GOEzatas Baldwin....-. Barrel, each end with 0. 30 eo, OO0s mAlideadan = | Noinjury. 
| twenty 83-inch auger 
holes. 
Lay yas ee done sass Barrel, top open....... 0. 30 1 3, PO a aeas One cae Do. 
63a Eger dover Barrel, iron header in 0. 30 als BO) ieee donee: Do. 
bottom. 
GA seeree EE ee doeteseees Box, fruit unwrapped. 0. 30 13 6008 tess GO ea ee Do. 
(Gian laees GO ees eee CG (Oyen oe eae or ere 0. 30 1 ool) Wee oe GOn see oaks Do. 
(loys | Rhode Island | 4 bu. basket........... 0. 30 1a era OO seers dose ae No record. 
| _ Greening. 
Saeee Bal divine seas ees CLOW era aecs 0. 30 LO DePaO tooe oe Clos Saw No injury. 
G8ee esos COM eee Barrel, top open......- 0. 30 1} 2,350 | A few scales Do. 
doubtful. 
Ue Aes aa eee Goya es Barrel, iron header in 0. 30 1 | 2,950 | 1 scale doubt- Do. 
| bottom. ful. 
(ESAS eee GOwe eee: Barrel, each end with 0. 30 1 | 3,400 | All dead...... Do. 
15 1-inch auger holes. | 
EE EE 
