. Farm machinery and farm motors. 186 A COMPRESSED WHEEL HUB FIG- - A SAKVENWHEEL HUB well sandpapered. In all, there should be 20 to 24 coatsapplied. It is stated that the varnish for the body shouldbe first-grade copal, and for the gears second-grade copal,which should be very carefully rubbed between coats andthe final coat should be rubbed with the palm of thehand. SLEDS 365. Utility and selection.—Sleds were the first meansof conveyance known to man, and among the uncivilizedthey are still the only conveyance. There has probablybeen as great a change made in the sled as in the wagons
. Farm machinery and farm motors. 186 A COMPRESSED WHEEL HUB FIG- - A SAKVENWHEEL HUB well sandpapered. In all, there should be 20 to 24 coatsapplied. It is stated that the varnish for the body shouldbe first-grade copal, and for the gears second-grade copal,which should be very carefully rubbed between coats andthe final coat should be rubbed with the palm of thehand. SLEDS 365. Utility and selection.—Sleds were the first meansof conveyance known to man, and among the uncivilizedthey are still the only conveyance. There has probablybeen as great a change made in the sled as in the wagonsince man commenced to improve his machinery. Due to the variety of work required of sleds and theclimatic conditions, there is almost invariably a differenttype of sled required in every locality. In heavily tim-bered countries where there is an extended season ofsnow, sleds are made with as much care as wagons, while WAGONS, BUGGIES, AND SLEDS 257 in communities where sleds are used only at intermittenttimes of the year and th
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