The book A Handbook of Laboratory Glass Blowing volume 2 was written by author Bernard D Bolas Here you can read free online of A Handbook of Laboratory Glass Blowing volume 2 book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A Handbook of Laboratory Glass Blowing volume 2 a good or bad book?
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In this case, also, a guide is quite essential in the early stages of drilling ; other- wise the end of the tube will stray. The speed of cutting may be increased slightly by making a number of radial slots in the end of the tube ; these serve to hold a supply of the grinding material. Grinding Lenses. This is scarcely within the scope of a book on glass-blowing for laboratory purposes, but it may be said that the lens may be ground by means of a permutating mould of hard lead or type-metal. Th...e rough shaping is done with coarse carborundum or emery, and successive stages are carried on with finer and finer material. The last polishing is by the LABORATORY GLASS-BLOWING 63 use of jewellers' rouge on the mould, now lined with a fine textile. Filing Glass. If a new file, thoroughly lubricated with a solution of camphor in oil of turpentine, is used, there is but little difficulty in filing the softer glasses. A slow movement of the file, without excessive pressure but with- out allowing the file to slip, is desirable.
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