ON DRAUGHT. 



42d 



mode of attaching the traces to the horses. If the connexion is made at 

 the proper place on the collar, the latter bears flat and evenly upon the 

 muscles which cover the collar-bone, and the shoulders of the horse are 

 left almost as free in their action as if the collar were not there. About 

 A, (figs 14, l.'S,) is the point of the shoulder where the trace should 

 co'me • and a little inclination downwards, which can easily be effected 

 in the' case of the shaft-horse by the shafts, and in the others by the belly- 

 band, will, if necessary, prevent the collar rising up, and inconveniencing 

 the throat of the horse. 



Fig. 14. P'9- 15. 



Reflecting upon the various circumstances which we have shown to 

 occur in the application of animal power, and the various conclusions we 

 have drawn while considering the best and most advantageous application 

 of this power-and we must be excused the frequent repetition of the 

 terms, fo^r the sake of the clearness gained by it-.t would appear that the 

 resistance should be as much as possib e rigid and inelastic so as to 

 receive immediately and unimpaired the direct effects of the >*'Shtly irre- 

 gular exertions of the animal; that this resistance should not be such as 

 to yield directly to a sudden impulse ; that it should be so far uniform as 

 to be free from violent changes or sudden shocks but not so constant a to 

 allow of nor remission, nor o? those alternations of exertion and com t.ve 

 relaxation which we have stated to be advantageous to the perfect deve- 



'"•'ZfatretrdsThrdegree of resistance, where velocity is not required, 

 a flrce ;f tS of from= lOOlbs. to 1251bs., or even IbOlbs.* accor<hng 

 to the strength of the horse, continued for eight hours a day, at about two 



■. The load which wiU produce this ^^^^.r^ ^^^^It:^ ^^^^^i^'^^^'^^^r 

 consider the subject of the roads, on the quality of which it wU! De seen u , 



depends. 



