PRACTICAL HINTS TO NURSERYMEN 123 
from escaping. In order to lower wagon, trenches 
should be made to allow wheels to drop down. Our 
canvas is 32 x 38 feet. This isa large sheet and un- 
wieldly to handle unless parties know how it should 
be done. Our method is to place the sheet behind the 
wagon, doubling the front end back over the other. 
To the corners of the top canvas fasten poles long 
enough to clear the load. Fasten lines at ends of 
poles, and when ready to raise have men pull the 
ropes. The air will be of great assistance, and if 
‘quickly done the canvas will sail over without friction. 
Our experience has been that hydrocyanic acid gas 
properly applied is certain death to all insect life.’’ 
Points to remember.—1. Never let a tree go out of 
the nursery unless it has been fumigated. 
2. Never fumigate a tree on which there is known 
to be a San José scale. The furnace, and not the 
fumigating house, is the place for such trees. A dead 
scale on the tree is just as demoralizing to the nursery 
business as a live one if seen by the buyer. 
3. Never use the gas stronger than 0.25 gramme 
cyanide per cubic foot on any kind of nursery stock. 
4. Never leave the trees exposed to the gas longer 
than an hour. ‘Thirty to forty-five minutes is suffi- 
cient. 
5. Never fumigate trees, especially peach, a second 
time. 
6. Never fumigate trees in a car, box, or cellar after 
they are packed. 
7. Never fumigate trees when they are drenching 
wet. They may be moist, even quite damp. 
