The English And American Mechanic Comprising a Span Classsearchtermspan
The English And American Mechanic Comprising a Span Classsearchtermspan
B Frank Van Cleve
The book The English And American Mechanic Comprising a Span Classsearchtermspan was written by author B Frank Van Cleve Here you can read free online of The English And American Mechanic Comprising a Span Classsearchtermspan book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is The English And American Mechanic Comprising a Span Classsearchtermspan a good or bad book?
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Nitrate of silver, 90 miniuis of spirits of wine, 90 miniuis of water; when the nitrate of silver is dissolved, filter the liquid, and add a small quantity of sugar (15 grs. , ) dissolved in 1>| oz. Of water and 1>^ oz. Spirits of wine. Put tlie glass into this mixture, having one side covered with var- nish, guni, or some substance to prevent the silver being attached to it. Let it renin in tor a few days, and you have a most elegant looking-glass; yet it is far more costly than the quicksilve...r. Another Method. — A sheet of tin-foil corresponding to the size of the plate of glass is evenly spread on a perfectly smooth and solid marble table, and every' wrinkle on its surface is carefully rubbed down with a brush; a portion of mercury is then poured on, and rubbed over the foil with a clean piece of soft woolen stuff, after which, two rules are applied to the edges, and mercury poured on to the depth of a crown piece; when any oxide on the surface is carefully removed, and the sheet of glass, perfectly clean and dry, is slid along over the surface of the liquid metal, so that no air, dirt, or oxide can possibly either remain or get between them.
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