TESTING WHEAT FOR PROTEIN 
as low, medium, and high heat. The standards for these heats were 
established as follows : 200 cubic centimeters of distilled water were 
placed in a 500-cubic-centimeter Kjeldahl flask similar to those used 
in the digestion process, and brought to a boil. The heaters and 
burners were so adjusted that 50 cubic centimeters of water e vapor- 
• 
Fig. 
1. — Kjeldahl digesting apparatus for the determination of protein in cereal and 
cereal products. Digestion flasks, with material in position 
ated with the low heat in 20 minutes ; 100 cubic centimeters with the 
medium heat; and 150 cubic centimeters with the high heat, To 
keep the heat intensities at the same degree, so that they would not 
vary from time to time and from day to day, each gas burner was set 
to give the same amount of heat, and this heat was kept constant by 
