178 HANDY-BOOK OF HUSBANDRY. 



horse should walk In the furrow, and the other two on the 

 unplowed land where they have the best footing. This requires 

 the plow to be set far to the furrow, which is easily accom- 

 plished by the use of Holbrook's 3-horse clevis, Fig. 91. 

 The same clevis may be used for two horses, by making the 

 attachment opposite the middle of the beam. 



