Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 111
meworkis glazed with extra thick plate glass, the same being groundupon both sides. It required 2,000 feet of plate glass to lOO /ohiison [J. F. I.. glaze these dials and sufficient glass if laid upon the groundto make a walk ten feet wide and the length of a block.The framework of the dials is… … Fig. 13. —View of dial framework before glazing. facing of the dials upon the outside is entirely of bronze,one-fourth of an inch thick. No iron of any sort appearing,all screws and bolts are made of bronze, which will endure,of course, always in any kind of weather. The dials are sofar above the…
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