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 
Standard single-walled distillation flask, 1,000 cubic centimeters capacity 
glass flasks, the essential feature being to extinguish the flame 
promptly Avhen the thermometer reaches a temperature of 190° for 
corn and 195° C. for oats. In using copper flasks in this machine 
Fig, 0, — Plaster of Paris mold fo^ determining the accuracy in size and shape of 
distillation flasks 
