. Elementary lessons in the physics of agriculture. Agricultural physics. [from old catalog]. 33 54. The Horse-fork and Pulley.—The horse-fork and carrier are used in lifting hay, as represented in Fig. 17. The mechanical advantage is that of pulley B, Fig. 16, diminished, of course, by the friction. When no pulley is used next to the fork, the traction exerted by the horse must always considerably exceed the weight of hay lifted, so that a single horse is fully tasked in freeing from the load and raising from two hundred to three hundred pounds of 55. Using- the Pulley to Raise Heavy St
. Elementary lessons in the physics of agriculture. Agricultural physics. [from old catalog]. 33 54. The Horse-fork and Pulley.—The horse-fork and carrier are used in lifting hay, as represented in Fig. 17. The mechanical advantage is that of pulley B, Fig. 16, diminished, of course, by the friction. When no pulley is used next to the fork, the traction exerted by the horse must always considerably exceed the weight of hay lifted, so that a single horse is fully tasked in freeing from the load and raising from two hundred to three hundred pounds of 55. Using- the Pulley to Raise Heavy Stone Out of the (jround.— The pulley may frequently be used to ad- vantage in raising heavy stone out of the ground, and in pulling stumps, as shown in Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original King, F[ranklin] H[iram], 1848- [from old catalog]. [Madison, Wis. ] State journal printing company
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Keywords: ., bookcentury1800, bookcontributorthe, bookdecade1890, bookyear1891
