n ingot, but neces- width and 6 inches long, which piece glue in the groove formed in the smaller piece of wood; and the pieces of brass driven over them; or by rings put on loosely, and tightened sitates a different mold for each different weight to be cast, on the sides, as afterwards mentioned,… … groove) left larger in the mid- about 2 inches thick, grooved dle, to be afterwards filed down round the edge, as shown in to fit the pinion tightly. Some- the accompanying sections, and times a steel pinion can be had with axle already fixed (hav- ary molds for casting steel toolingots are put…
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