10 
BULLETIN 1375, U. S. DEPARTMENT OF .AGRICULTURE 
of corn and oats, the same treatment is required in the use of copper 
flasks, when spun from 16 -ounce sheet copper and used in the tester 
described in this bulletin, as is required when the tests are made in 
/^ cm. 
Fig. 8. — Standard single-walled distillation flask, 1.000 cubic centimeters capacity 
glass flasks, the essential feature being to extinguish the flame 
promptly when the thermometer reaches a temperature of 190° for 
corn and 195° C. for oats. In using copper flasks in this machine 
Fig. 9. — Plaster of Paris mold for determining the accuracy in size and shape of 
distillation flasks 
