12 



A MOISTURE TESTER FOR GRAIN. 



Corncobs. — Use 50 grams of cob cut in pieces that can be easih'' 

 removed from tlie flask and 250 cubic centimeters of oil, and extinguish 

 the flame when the thermometer registers 190° C. 



Cottonseed. — Use 50 grams of seed and 150 cubic centimeters of oil, 

 and extinguish the flame when the thermometer registers 190° C. 



Flaxseed. — Use 100 grams of seed and 150 cubic centimeters of oil, 

 and extinguish the flame when the thermometer registers 175° C. 



Kafir. — Use 100 grams of grain and 150 cubic centimeters of oil, and 

 extinguish the flame when the thermometer registers 190° C. 



Oats. — Use 50 grams of grain and 150 cubic centimeters of oil, and 

 extinguish the flame when the thermometer registers 195° C. In 

 oats that are light and chafty special care should ])e taken to insure the 

 thorough mixing of the oil and grain and to heat with a slower flame 

 in order to reduce the foaming to a minimum. In extreme cases it 

 may be necessary to add an extra 50 cubic centimeters of oil. 



Rice (unhulled). — Use 100 grams of grain and 150 cubic centimeters 

 of oil, and extinguish the flame when the thermometer registers 190° C. 



Rye. — Use 100 grams of grain and 150 cubic centimeters of oil, and 

 extinguish the flame when the thermometer registers 175° C. 



Soy hean. — Use 100 grams of beans and 150 cubic centimeters of 

 oil, and extinguish the flame when the thermometer registers 170° C. 



Wheat. — Use 100 grams of grain and 150 cubic centimeters of oil, and 

 extinguish the flame when the thermometer registers 180° C. 



OIL FOR THE MOISTURE TESTS. 



In making tests a good grade of mineral engine oil should be used. 



The oil must be free from water, should have a 

 flashing point in open cup of approximately 200° 

 to 205° C. (392° to 401° F.), and preferably a 

 viscosity between 10 and 15 (Engler) at 20° C. 

 (68° F.). The higher the viscosity the greater 

 the danger of boiling over, and for this reason 

 cylinder oils should not be used; as a rule, they 

 are too heavy for good results. 



After the tests are completed and while the oil 

 is still hot, empty the contents of the flasks into 

 a strainer to recover the oil, which can be used 

 repeatedly. A funnel strainer fitted to the 

 mouth of a 3 or 4 gallon milk can, as shown in 

 figure 10, is serviceable and inexpensive. 



MEASURING THE OIL. 



Fig. 10.— Strainer fcr recover- 

 insr the oil. 



A conical glass graduate, as shown in figure 11, 

 having a capacity of 150 cubic centimeters, is ordinarily used for 

 measuring the oil for the test. A more complete device consists of a 



[Cir. 72] 



