Circular 21 - Insecticides and Subsidiary Materials 
It also contains a list of manufacturers 
and firms fronk whom such materials may be ob- 
tained, although many of them can be procured 
under Government contract, and also from local 
stores. Prices given herein were obtained 
largely from the 1939-40 Chemical Industries 
Buyers Guide Book, also from the 1941 August 
issue of Oil Paint and Drug Reporter. These 
prices apply only to open market purchases and 
not to those quoted on the General Schedule of 
Supplies. In view of the unsettled conditions, 
prices are continually changing and are likely 
to be higher. 
ALCOHOL 
Alcohol (Ethyl) at a concentration of 
70 percent in water is used as a preservative 
for insect specimens, such as the larvae or 
wrigglers of mosquitoes, for identification 
purposes in connection v/ith mosquito control 
operations. The ordinary rubbing alcohol also 
will suffice for this purpose. 
Sthyl alcohol (CpHcUH) is a colorless, 
volatile, inflammable liquid which is a product 
of fermentation o In its pure state it is ob- 
tained chiefly from potatoes and various grains 
by a process of bre\/ing followed by fractional 
distillation. 
The price of alcohol in drums in carload 
lots varies from ^6.02^ to $6.44 per gallon. 
In barrels it is 2 cents higher than in drums. 
Available on contract: see Glass 51 i 
General Schedule of Supplies, Procurement 
Division, Treasury Department. 
