i:S LABORATORY MANUAL OF AGRICULTURE 



number under classification in the accompanying outline 

 form. 



Spread the sample out on a blank piece of paper and make 

 a detailed study of each of the divisions given below : 



Purity. Make a study of purity by separating the sample 

 into the following groups : oats of class ; other oats ; other 

 grains ; foreign matter. Weigh each group and record the 

 weight and per cent of the sample in the blank form in the 

 column of that sample number. Quantities less than one 

 tenth of one gram may be indicated as "trace." All the 

 groups of the division should total 100 per cent for purity. 



For the remaining determinations in this study use ten 

 grams of the oats from which other grains and foreign matter 

 have been removed. 



Soundness. Make a study of soundness by separating 

 this sample into the following groups : sound kernels ; in- 

 jured kernels. Weigh, and record the weight and per cent of 

 each group. The total for soundness should be 100 per cent. 



Color. There is considerable variation in the color of 

 oats, as white, yellowish, brownish, red, and black. Oats 

 is sometimes discolored by adverse weather conditions, 

 and the original color is obscure. Separate the sample into 

 the different colors named above. Weigh, and record the 

 weight and per cent in each group. The total for color 

 should be 100 per cent. 



Size. Separate the sample into the following groups for 

 size : large, medium, small. Weigh, and record the weight 

 and per cent of each group. The total for size should be 

 100 per cent. 



Separate from the sample 100 average-size kernels. Weigh 



