A MOISTURE TESTER FOR GRAIN, 7 



Satisfactory cleaners can also be made as needed by twisting cotton 

 waste, strips of cheese cloth, or some other similar substance about 

 one end of a piece of fairly heavy ware. 



DISTILLATION FLASKS. 



The special distillation flasks, with a capacity of approximately 

 1,000 cubic centimeters, should be made of the best grade of resistant 

 glass and should be well annealed in order to withstand sudden 

 changes in temperature without breaking. The necks of the flasks 

 should be sufficiently heavy to stand tight corking. Figure 5 shows 

 one of these flasks in which the dimensions of the different parts are 

 given in both centimeters and inches. 



Fig. 5.— Distillation flask. 



In some instances dealers have supplied flasks showing such wide 

 variations in the dimensions that they were entirely useless. It is 

 therefore recommended that in ordering flasks it be definitely stated 

 that they must be in accordance with the specifications given in this 

 circular. In case the dimensions of the flasks, as well as other parts 

 of the apparatus, are not approximately as herein specified, they 

 should be returned. 



FLASK SUPPORTS. 



The pipestem triangles originally used for supporting the flasks 

 above the ware gauze resulted in the breakage of an undue number of 

 flasks, and for that reason these triangles have been replaced with 



[Cir. 71'] 



