THE BROWX-DUVEL MOISTURE TESTER. 
15 
BALANCE FOR WEIGHING SAMPLES 
Though not a part of the moisture tester, a balance is necessary 
for weighing the samples of grain to be tested. A balance of simple 
construction, having an accuracy and sensitiveness of not less than 
0.1 gram, has been found satisfactory. Balances similar to the type 
shown in Figure 16 will meet all requirements. 
Whatever the type of balance used, it should rest on a firm sup- 
port, preferably a heavy shelf securely fastened to a solid wall of 
Pig. 14. — Automatic oil-measuring device 
the building. Such a shelf will greatly facilitate the keeping of it 
A in balance, which is absolutely essential for reliable work. 
SUPPLY PIPES FOR GAS-HEATED MOISTURE TESTERS 
It is absolutely necessary that a plentiful supply of gas be on hand 
to operate a moisture tester. The only way to assure this is to have 
gas pipes of sufficient size. The gas pipe on a single 6-compartment 
tester should be at least one-half inch inside diameter and prefer- 
