The book Report On the Manufacture of Glass was written by author United States. Bureau of the Census. Statistical Research Division. 10th Census, 1880 Here you can read free online of Report On the Manufacture of Glass book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Report On the Manufacture of Glass a good or bad book?
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In the pressing process as usually practiced a metallic plunger is driven into a metallic mold, into which molten glass has beeu jilaced by mechanical means, the glass taking the form of the mold upon its outer surface, while the inner is modeled by the plunger itself. The simplest form of mold is a flat slab of iron or other metal with slightly raised sides. For articles of some complexity molds are made in two or more divisions, hinged together (joint molds), and opening outward. The chief pa...rts of the mold are termed the "collar" and the "base". The ordinary form of press used is shown iu the accompanying cut, the mold, with its handles, being shown on the table of the press. The molten glass having been gathered and dropped into the mold, a sufflcient quantity is cut off, the mold is jiushed under the plunger, and the long lever at the right of the press is pulled down. The plunger enters the mold, the glass is iiressed into all parts of the same, the plastic mass solidifies, the iilunger is withdrawn, the mold opened, and the glass in the required form is withdrawn, to be fire-polished and annealed.
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