New YorK AGRICULTURAL EXPERIMENT STATION. 339 
FoRMULA FOR IMMATURE Stock, BupD STICKS, ETC. 
Potassium cyanide, 98 to 99% pure.......... 5g oz. (avoir.) 
RR REM Maidan. $rvhe Ghats aye 840d 3:4 «esa e's Sant, OZes. s 
ymbrrir el ed Sk kD le wb  deldn eo ld OG yore b ae 2% fl. oz. 
REFUMIGATION. 
Johnson finds that the peach will not stand a second fumiga- 
tion. Apple, pear, etc., are not injured by it, but it is well not 
_to expose stock a second time to the gas after it has been once 
properly fumigated. | 
FUMIGATION OF STOCK NOT DORMANT. 
Stock which has passed out of the dormant condition cannot 
be safely fumigated with gas at the strength given for dormant 
stock, neither can it in the fall before the leaves have dropped. 
THE FUMIGATION HOUSE. 
The first essential in building a room or box to be used in the 
fumigation of nursery stock is to make it air tight. If the room 
is not air tight the results will be uncertain and surely unsatis- 
factory. . 
It is also important that the room or house be so located that 
it can be readily ventilated without having the escaping gas 
interfere with other work. It is best to provide for ventilation 
by flues opening through the roof. This is especially desirable 
where the fumigation chamber occupies a portion of a packing . 
shed or any other building which is filled with workmen during 
the fumigating season. 
Figures 10 and 11 give different views of a very satisfactory 
fumigating house used by the R. G. Chase Nursery Co., Geneva, 
N. Y. It is modeled after the house described in Bulletin 57, 
Maryland Agricultural Experiment Station, pages 92 and 93. A 
somewhat detailed description of it is herewith given because it 
represents a very good type of air tight construction. 
The outside dimensions of the building are 16 ft. x 32 ft.; 
posts 7 ft. and peak of roof 9 ft. high. The studding, which 
is 2x4 inch hemlock, is covered outside with building paper lapped 
