Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 113
y counterbalances, which are not shown in thecut. The sheathing of the hands is made of sheet copper, thehands being elliptical in form. The centers are supportedby rigid bronze framework, which is shown in the unfin-ished hand. The shafts of the hands are trussed, as shownby v-shaped longitudinal… … Fig. 14. —Sketch of dial, etc , from without. Feb., igor.] Philadelphia City Hall Clock. 103 The hands are made elliptical so as to oppose as little re-sistance to the wind as possible. Notwithstanding thesehands are made as light as rigidity and durability will war-rant, they weigh with the…
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