20 QUICK METHOD FOE DETERMINING MOISTURE IK GRAIN. 



meters below a horizontal line drawn from the top of the neck of 

 the flask. The total height of the flasks should be IT or IJi centi- 

 meters, or such that one-half centimeter or more of the neck will 

 protrude thru the covers (/t) of the evaporating chaml^er in order to 

 protect the rubber stoppers (r) as much as possible from the action 

 of the high temperatures. 



THE THERMOMETERS. 





While any standard chemical thermometer may be utilized, a 

 thermometer graduated in degrees from 100° C. to 210° C. has been 

 found most convenient. The 100-degree mark should 

 come just at the top of the rubber stopper in the flask 

 ( IT centimeters from the bulb end of the thermom- 

 eter), so that the rapidity of the rise in temperature 

 can be watched it desirable after the water begins to 

 pass over. The total length of such a thermometer 

 need not be more than 2T or 28 centimeters. The bulb 

 end of the thermometer should extend well into the 

 mixture of corn and oil. approximately 1 centimeter 

 from the bottom of the flask. 



-\ 



4 

 ^ 



THE CONDENSER TUBES. 



S2 



The construction of the condenser tubes (figs. 3 and 

 5), as represented at s in the detailed drawings, is 

 shown in figure 11. The thimble at the top is 22 milli- 

 meters in diameter inside and 3 centhneters deep, giv- 

 ing ample space to make good connection with the dis- 

 tillation flasks by means of a rubber stopper on the 

 end of the side tubes. The diameter of the remaining 

 part of the tube is approximately T millimeters, the 

 tube having a total lenofth of 33 centimeters, so that 

 the top of the tube will stand about one-half centime- 

 FiG. 11. -Condenser tcr above the top of the water tank and the bottom of 

 '^''*'- the tube project about 2 centimeters below the rubber 



.stopper e at the bottom of the tank. The lower end of the tube 

 should be cut at an angle, as shown in the illustration. 



THE GRADUATED CYLINDERS FOR COLLECTING AND 3IEASURING THE WATER. 



A convenient form of container for collecting and measuring the 

 amount of water expelled from the grain is shown in figure 12. 

 Each of the two cylinders here shown is 20 centimeters (approxi- 



99 



