12 Weeds. 



the Russian thistle in others. In some sec- 

 tions the seeds of wild mustard are so 

 numerous in the soil that, though no more 

 were allowed to ripen during the present 

 generation, there would probably still be a 

 few left to grow plants for the next genera- 

 tion to destroy. Other varieties than those 

 named are increasing with alarming rapid- 

 ity. Unless some efifective measures are 

 taken to destroy them, they will increase 

 more and more, to the great injury of our 

 agriculture. It is surely a stigma on the 

 agriculture of any country and a withering 

 criticism on the defectiveness of the modes 

 of cultivation that are practiced in it, when 

 weeds increase rather than decrease. In 

 the hope of doing something to stay the 

 progress of the great tide of weed invasion 

 and weed aggression, this book has been 

 written. The writer cherishes the hope 

 that every interested reader will exert him- 

 self to the utmost to stay the progress of 

 weed extension by doing his best to utterly 

 annihilate weeds in all their seriously nox- 

 ious forms. 



