Watch the Grain Screenings. 7; 



and the seeds that are caught in the grain 

 box are destroyed, the danger from them 

 is even more completely averted. Because 

 of the fact that thrashing machines are 

 often instrumental in carrying weed seeds 

 from one locality to another, it has often 

 been found advisable for several farmers to 

 club together and purchase a machine of 

 their own. For the same reason, small 

 machines run by tread power are some- 

 times used by individual farmers. How- 

 ever, these methods of fighting weeds have 

 obvious disadvantages which will prevent 

 their general adoption. 



6. Give attention to grain screenings. 

 The chafit* and screenings from the fanning 

 mill should receive the most careful atten- 

 tion. Whenever weed seeds are suspected, 

 the chaff from the winnowed grain that is 

 being prepared for market, or indeed for 

 any other use, should be burned. The 

 screenings should be ground, boiled or 

 steamed before being fed ; or if fed other- 

 wise, they should be strewn on surfaces 

 where the weed seeds they contain are not 

 likely to do any harm. The proportion of 

 weed seeds grown in a crop which collect 

 in the screenings obtained in cleaning it is 



