The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame; For the Use of Chemical and Physical Students

The Methods of Glass Blowing and of Working Silica in the Oxy-Gas Flame; For the Use of Chemical and Physical Students

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...tubes into larger. On account of the small space that may be left between the inner and outer tubes of an ozone generator, and of the length of the inner tube, its construction needs great care. I find the following mode of procedure gives good results. Select the pieces of tube for this instrument as free from curvature as possible. For the inner tube, a tube 12 mm., or rather more, in external diameter, and of rather thin glass, is drawn out, as for closing, until only a very narrow tube remains at C, the end of 0 is closed the area round 0 is carefully blown into shape, so that by melting off C the tube A will be left with a well-rounded end. A small bulb of glass is next blown on A at B. This bulb must be of slightly greater diameter than the contracted end E of the larger tube (II.), so that B will just fail to pass through E. The length from B to G must not be made greater than from E to G on the outside tube. The end at C is then to be cut off so as to leave a pin-hole in the end of A. The outer tube (II.), whose diameter may be 5 or 6 mm. greater than that of A, is prepared by sealing a side tube on it at F, after previously contracting the end E. For this purpose the end E should be closed and rounded, and then reheated and blown out till the bulb bursts. To ensure that the diameter of the opening is less than that of the tube, care must be taken not to re-heat too large an area of the end before blowing it out. It is very important that the cross section at E shall be in a plane at right angles to the axis of the tube. Wrap a strip of writing paper, one inch in breadth, closely round the end of A at G till the tube and paper will only just pass easily into the mouth D of the outer tube, push the inner tube A, with the paper upon it, ..show more

Product details

  • Paperback | 28 pages
  • 189 x 246 x 2mm | 68g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236564278
  • 9781236564276