SEED ANALYSIS 



75 



different parts of the bag or container, usually from the top, 

 middle, and bottom. From the sample from 2 to 5 grams are 

 weighed out, and the impurities and desirable seeds are then sepa- 

 rated, usually by means of a lens like the one in Figure 12. By 



e.^fe 09^ 0% 



Tied clove*- TvefoW Cuv\e(i(iock 



^# V ^@ 



- 4 , ,^ Lamb's 6V\l\\a ^ 



Laciv^^tUvvnA* q.ua^'Vers mustard 



^ 





#?i 



9Tv.e\d, 

 doddc 



ioM-J.r^ 



'j>\unVa 



8CVpve\: , 

 cXodaev 



^.0 



a?/ 



'a^Qy 



^ ^^ 14Canad:c. 15WAA ^ 



Fig. 73. — Some weed seeds and fruits commonly found among Red Clover 

 seeds. Enlarged and about natural size. From Farmers' Bulletin 4^5, 

 U. S. Dept. of Agriculture. 



dividing the weight of the desirable seeds and the weight of the 

 impurities by the number of grams analyzed, the percentage of 

 each is obtained. Thus, if 5 grams are analyzed and the weight 



4.8 



of the desirable seeds found is 4.8 grams, then 



96 per cent, 



which is the percentage of purity. In determining the kinds of 



