Circular 21 - Insecticides and Subsidiary Materials 55 
Caution ; Nicotine sulfate is very 
poisonous and should be kept in a safe place 
in tight containers plainly labeled and 
marked ''Poison." Avoid wetting the skin 
with the spray. 
This material may be purchased in 
drums at the factory at 70.3 cents per pound 
and in 10-pound tins at 36. 5 cents per pound. 
?or manufacturers and distributors 
see numbers 19, 24, 30, 37, 45, 79, 81, 82, 
and 108 of list at end of this circuDar. 
OIL 07 CIl'HOI^TXLLA 
Oil of citronella is often used alone 
or in combination with other m:\teri:\ls, such 
as camphor, to repel mosquitoes. Application 
of the repellent is made to the exposed por- 
tions of the skin. 
This oil is derived from citronella 
grass, chiefly from Ceylon and Java, It is a 
volatile, almost colorless to Dale vellow or 
reddish liquid having a pleasant, pungent 
aroma. Citronella oil is used in liniment 
for rheumatism and in perfumes. 
The m:iterial should be kept in a cool 
place, well closed, and protected from light. 
Oil of citronella is marketed in drums 
at 90 cents per pound, and in 1-pound cans at 
95 cents (Ceylon) and drums and cans at 85 to 
90 cents per pound (Java), 
Available on contract: see Class 51, 
General Schedule of Supplies, Procurement 
Division, Treasury Department, 
