A MOISTURE TESTER FOR GRAIN. 



THERMOMETERS. 



It is of the utmost importance that the thermometers be of extra 

 quaUty and not the ordinary grade of chemical thermometers 

 which are so 

 commonly fur- 

 nished with ap- 

 paratus of this 

 general charac- 

 ter. The suc- 

 cess of this 

 method of mak- 

 ing moisture 

 determinations 

 depends largely 

 upon the accu- 

 racy with which 

 the temperature 

 readings are 

 made, and any 

 thermometer 

 showing an er- 

 ror of more than 

 one-half of a de- 

 gree should not 

 be used unless 

 such errors are 

 known and pro- 

 vided for in the 

 readings. 



It is also nec- 

 essary that the 

 mercury bulbs 

 of the thermom- 

 eters be of ap- 

 proximately the 

 same length, so 

 that some uni- 

 formity can be 

 had as to the 



<lepth to which the thermometers are immersed in the oil, the correct 

 positions of which are shown in figure 9, on page 10. 



[Clr. 72] 



Fig. 2.— Sectional view, showing the various parts properly connected for use. 

 A, Distillation flask in position, three-eighths of an inch above the wire 

 gauze; B, distillation Qiisk in wooden rack, used only during filling. 



