32 



ON PLOWS. 



eighths of one hundred pounds. The number of square 

 inches of earth turned, is ascertained by multiplying the 

 width and depth of the furrow together; and the pro- 

 portionate result is ascertained, by dividing the quanti- 

 ty of earth turned, by the pow'er applied. The last col- 

 umn shows the number of square inches of earth turned 

 by the application of one hundred pounds of power. 



Work was done by plows Nos. G and 7, when drawn by 

 a powerful span of horses as follows: 



No. 



Uescripi ioi of Hlo( 



Pownr j Depthof VViilh of Crrl, 

 applied. . fuirovv. furioiv. tuniecJ. 



; Kan li turned 

 Result. I by 1(10 pounda 

 j ol" power. 



6. PifOUTY & Cq'3, a. 40 



7. RUGGLE?, fcCo's, C. 40 



H 



H 



12 66 

 12 75 



1.65 



1.87 



13J 

 15" 



In experiments of this kind, the time in which the 

 work is performed, is an important item to be taken in- 

 to consideration. This will be apparent, when we 

 compare the work done by horses with that done by 

 oxen. Probably, the furrows turned by the horses were 

 done in two thirds of the time occupied by the oxen; 

 that is, the horses would plow three furrows, while the 

 oxen plow two. How long they would be able to con- 

 tinue to work in this manner, is proper to be inquired 

 into. For if they could continue through the day, and 

 the plowman could hold out to follow them, it is mani- 

 fest that the result produced would be much in their fa- 

 vor. Especially when trained as, in the present in- 

 stance, were Mr. Marland's horses, to use, without a 

 driver, the plowman taking the whole charge of the 

 team. 



We have been thus particular in noticing all the in- 

 cidents connected with these experiments, because in 

 this way alone is it possible to approximate to a just 

 comparison of merits; — and when this is done, certainty 

 is not attainable. Very much depends on the skill and 

 adroitness of the plowman. A little additional atten- 

 tion would add one inch to the width of the furrow. 

 Care to keep the plow true without pressure upon the 

 handles, will lessen the power of the draft. So that the 



