. Elementary lessons in the physics of agriculture . Where heavy loads are to be moved, like puilmg stones or stumps, or hauling a load out of a rut or out of the mud, the second type of evener will always allow a matched team to pull a larger load, because the horse which happens to be thrown behind, in attempting to start the load, is placed at a disadvantage and the other horse can only pull enough to hold his end against the one placed at a disadvantage. So, too, in doing heavy work, where one horse is naturally a little freer or stronger than the other, the tendency is always to throw mor
. Elementary lessons in the physics of agriculture . Where heavy loads are to be moved, like puilmg stones or stumps, or hauling a load out of a rut or out of the mud, the second type of evener will always allow a matched team to pull a larger load, because the horse which happens to be thrown behind, in attempting to start the load, is placed at a disadvantage and the other horse can only pull enough to hold his end against the one placed at a disadvantage. So, too, in doing heavy work, where one horse is naturally a little freer or stronger than the other, the tendency is always to throw more than half the w^ork upon the slower or w^eaker horse. 32. "Giving One Horse the ; — The fre- quent practice, where the two horses of a team are not equally strong, of " giving one horse the advantage " is based upon the principle that the amount of work done by each horse is inversely proportional to the length of the lever arm upon which he works. Suppose it is desired to so modify an evener that three-eighths of the work will fall upon one horse and five- eighths upon the other. In this case the horse which is to do five-eighths of the work must have his end of the evener shortened until its length is just three-fifths as long a"> that of the horse which is to do three-eighths of the work. If the distance from 1 to 2 in Fig. 8 is forty-eight inches, then in
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