290 THE WHEAT CULTUKIST. 



from a winter, to a spring grain that the plants will not 

 endure severe freezing. Spring wheat of this charac- 

 ter, should never be sowed until the ground has become 

 thoroughly warmed. This accounts for the fact, that in 

 numerous instances, certain farmers have always had 

 better success when they have sowed their spring wheat 

 quite late in the spring. On the contrary, when a va- 

 riety of spring wheat is still so much of a winter wheat, 

 that freezing does not injure the young plants in the 

 spring, the seed should be put in as early as practica- 

 ble ; and the crop will be the better for early seeding. 



These thoughts will explain why it is best to sow 

 spring wheat very late, sometimes / and early in the 

 growing season, at other times. A farmer must know 

 his seed of what sort it is. Then, he must understand, 

 most thoroughly, the habit of growth, and how far the 

 variety has been changed from a winter to a spring 

 grain. When he possesses a perfect understanding of 

 these points, he will experience very little difficulty in 

 growing fair crops of spring wheat, provided his seed is 

 right. (Head pages 170 and 171.) 



MOKROE'S ROTARY HARROW. 



The harrow herewith illustrated, represents an imple- 

 ment invented by H. EL. Monroe, Rockland, Maine, and 

 manufactured by " The American Agricultural Works," 

 Tenth avenue and Twenty-fourth street, New York 

 city. The arms of this harrow are all united at the 

 centre, and a circular way made of a flat bar of iron 

 is bolted to each arm, near the outer extremity. An 

 iron wheel travels on this way when the harrow is in 

 motion. The object of the iron wheel is to press the 



