EXERCISE 12 (Continued) 



the development of the starch is somewhat curtailed and, consequently, the 

 percentage of hull is higher. A good oat may have as high as 30 per cent hull. 

 Cut two points for every per cent of hull above this. 



f FIG. 22. A hand power seed cleaner. The seed is sifted through screen as far as 1, the straw, particles, 

 etc., being eliminated at 2. As the seeds slide down over the screen above 3, the sand and fine seeds drop 

 through and are eliminated. The good seed passes into the air shaft at 4, the air moving upward forced by 

 the rotary fan at 8. The perfect seeds being heavier fall and pass out at 5. The remaining dust, chaff, 

 etc., are discharged through the dust hood at 6. Light, imperfect and foreign seeds fall into the opening at 7. 

 (Courtesy A. T. Ferrell & Co., Saginaw, Michigan.) 



Note. If one is careful to mix each sample thoroughly and to take 

 the grains strictly as they come, it is possible to use 100-grain samples instead 

 of heaping teaspoonfuls. In this way the percentage figuring is simplified 

 and much time is saved on the hulling. 



Use of Seed Cleaner. If a seed cleaner (Fig. 22) is available, weigh a 

 bushel of oats and then clean it. Weigh the products resulting. 



42 



