A Steam Boiling Plant for Insecticides* 
By H* A* Gossard* 
Where the lime-salt-sulphur wash, bi¬ 
sulphide of lime, resin spray, or any in¬ 
secticide requiring prolonged cooking is 
needed the most economical method of 
preparation is by boiling with steam. I 
prepared the accompanying diagram by 
combining the best features of two or 
three different Ohio boiling plants. By 
courtesy of the Ohio Experiment Sta¬ 
tion I give it to the Florida horticultur¬ 
ists before having used it in our own pub¬ 
lications. - 
A is a water tank into which water is 
raised by wind or steam power. In the 
plant from which the diagram was 
taken it is a 1,500 gallon tank of 
galvanized iron, sitting on the ui>- 
per or haymow floor of the barn, 
and water is pumped into it through 
the water pipe x by means of a windmill. 
The stopcock b is closed when the tank is 
full. A is a faucet from which cold water 
is drawn at will to meet the miscellaneous 
needs of farm and household. D is the 
boiler reservoir and, being connected with 
A by means of the water-pipe X is 
kept filled. In the plant represented, the 
boiler reservoir was a* galvanized iron 
cylinder, perhaps eight feet high and one 
foot in diameter, having a capacity of 
nearly 50 gallons. It was a discarded gas 
chamber, having once been part of a gas 
supply plant. Its bottom end sets just a 
few inches behind the boiler so that the 
water is kept moderately warm and can be 
safety turned into the boiler without ad¬ 
ditional heating. H is the boiler, the pipes 
w leading from it, being steam pipes. The 
stopcock V opens and closes a pipe leading 
from the reservoir D into the boiler H. 
When it is desired to fill the boiler with 
water, the stopcocks v and u are both 
opened; the steam, passing through u into 
the top of the reservoir D, forces the water 
through V into the boiler H, doing away 
with the need of an injector. The steam 
in D soon condenses and water is drawn 
into the reservoir through x to fill the 
vacuum which would otherwise be pro¬ 
duced. V is a platform upon which sets 
the hot water tank B and the boiling cask 
X. B may be of either iron or wood, like¬ 
wise X. In the plant diagramed, X rep¬ 
resents a 50 gallon barrel and B a 100 gal¬ 
lon galvanized iron tank. Opening the 
faucet c fills the tank B with water; open¬ 
ing the stopcock d lets steam into the 
water, which escapes through the three 
openings at m. On the opposite side of the 
arm at r, are three openings, letting out 
steam in an opposite direction, thus set¬ 
ting the water in a whirl. 1 is a faucet 
from which warm water may be drawn at 
pleasure, h is a stopcock letting the water 
into the diluting tank O, which sets on the 
platform I. By opening the stopcock e, 
steam is conducted into the boiling cask X 
where it escapes through three openings 
at n and three on the opposite side of the 
other arm at o. This arrangement gives 
constant agitation or whirling during the 
cooking process, g is a stopcock to let the 
boiled product into the diluting tank O. 
g must be located as close as possible to 
