Book IV. DRILL MACHINES. 389 



2560. IFeir's manuring one row turnip drill (Jig. 318.) is a remarkable improvement 



on the Northumberland implement. It has a manure hopper (a) and a seed hopper (6), 

 the same as the other; but the manure, in place of being dropped along with the seed, is 

 deposited in a deep gutter, made by a coulter (c) which goes before; this manure is co- 

 vered by a pronged coulter (</) which follows the other ; next comes the coulter which 

 forms the gutter for the seed (e) . The seed is thus deposited about one inch above the 

 manure. One roller of the concave kind goes before the machine, and another light one 

 of the common kind follows after it : or without attached rollers, the drill may be affixed 

 to one side of the common roller behind, which roller may prepare one drill and cover the 

 seed sown on another eaqji course. 



2561. A machine for dibbling beans, impelled by manual labor, has been already noticed 

 (2 169). A horse dibbling machine {Jig. 319.) has been invented, though very little used, 



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