150 



POWDERED VEGETABLE DRUGS 



available, it will be necessary for each analyst to determine such starch 

 granule factors for himself as he may require. Such factors need be 

 determined once only, provided a permanent record is kept. The 

 following are a few numerical starch granule factors : 



TABLE OF NUMERICAL STARCH COUNTS AND STARCH PeRCENTAGES* 



* From a table prepared by Berger at the author's suggestion. 



1 The aggregates were counted as one. 



2 The aggregates were broken up and the individual granules were counted. 



3 Exact count impossible because of agglutination of many granules. 



* There is considerable variation in the number of starch granules in the different wheat flours 

 and also in the ratio of larger (.15/i and over) and smaller (less than 25/*) starch granules in one and 

 the same variety of wheat flour. 



5. Determining the Starch Granule Size Ratio in Wheat Flours. 

 The suspensions of the flour and the starch counts are made as de- 

 scribed under method (4) just given. Two separate counts are how- 



