146 



OPERATIONS OF TILLAGE. 



because the soil is then better pulverized, and less poached 

 by the feet of the cattle. 



The harrow is often employed upon winter grain, in 

 the spring, and to manifest advantage. A hght one is 

 best for this purpose, as the object is merely to break and 

 pulverize the surface. It is also employed, and here is 

 a heavy one wanted, to scarify old meadow and pasture 

 grounds, to extirpate moss, and to cover the seeds of 

 grasses which may be sown to renovate them. For the 

 latter purpose, as also for pulverizing stifi' clays, Conck- 

 lin's press-harrow, fig. 34, is an admirable instrument. 



F'm. 34. 



The harrow^s represented in fig. 33 are of the most 

 approved construction, for hght soils and for seeds. The 

 frame is w^ood and the teeth are iron. 



" They are connected together in pairs by hinges. 

 They consist each of four bars of wood, A B, C D, &.C., 

 which are joined together by an equal number of cross- 

 bars of smaller dimensions, mortised through them. The 

 larger bars may be 2i inches or more in width, by 3 

 m depth, and the smaller 2J inches in width, by 1 in 

 depth. The larger bars are placed oblique to the smaller 



