Circular 21 - Insecticides and Subsidiary Materials 52 
MOLASSES (Black Strap) 
Black strap molasses is used as an 
attractive bait for house flies and blow- 
flies, in connection with fly traps. It 
is a thick, sticky, brovvn or dark colored, 
viscid sirup and contains impurities. 
Black strap is the final mother liquid 
remaining after the crystallization of su^^ar 
from the juice of sup;ar cane or beet sugar, 
more particularly the third molasses. It 
is also a by-product of raw sugar. Molasses 
is extensively used as a constituent of many 
mixed cattle feeds and as a raw material for 
the manufacture of industrial alcohol. 
Black strap molasses is obtainable in 
tanks at a cost of 9^ to 11 cents per gallon 
the price varying in different parts of the 
country. 
Available on contract: see Glass 56, 
General Schedule of Supplies, Procurement 
Division, Treasury Department. 
MOTH PROOFING ICITERLVLS 
These are solutions that are used for 
making fabrics and furs resistant to such 
insect pests as webbin.': clothes moths and 
related forms, also carpet beetles and buffalo 
moths. They are best applied in the hot dye 
bath while the clothes or fabrics are being 
manufactured. Most of these materials are 
patented and the process is described in the 
patents. Fabrics, if properly treated, remain 
resistant to insect attack for a lon^ time. 
