Scientific Tests of Colored Glass for Optical Purposes; Including a Short History of Glass and Glass Terms

Scientific Tests of Colored Glass for Optical Purposes; Including a Short History of Glass and Glass Terms

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1919 edition. Excerpt: ... per cent. 2 per cent. 70 per cent. 20 per cent. 50 per cent. 30 per cent. 50 per cent. 35 per cent. 80 per cent. TABLE No. 14 Tested by Dr. Satterlee U. V. BE U. V. 0 per cent. 80 per cent. 5 per cent. 85 per cent. 7 per cent. 90 per cent. TABLE No. 15 Tested by Dr. Satterlee U. V. Bi U. V. 0 per cent. 10 per cent. 20 per cent. 50 per cent. 0 per cent. 30 per cent. 60 per cent. 100 per cent. Tri U. V. 20 per cent. 18 per cent. 20 per cent. 22 per cent. 25 per cent Tri U. V. 0 per cent. 22 per cent. 33 per cent. Tri U. V. 42 per cent. 48 per cent. 5 per cent. 20 per cent. The tests made for the ultra violet, bi-ultra violet and tri-ultra violet rays, of the colored glasses, furnished Dr. Satterlee by the author, were rather exhaustive. The glass, No. 1917, is the only one that is opaque to both the ultra violet and tri-ultra violet radiation. It is indeed a pity that this glass is not available for the optical trade for it is certainly a wonder; however, it may be made a commercial possibility soon, and if so, we can expect to see many of the other colors quickly disappear. RADIUM TESTS.--The last of the series of tests were to discover if any of the glasses would completely obscure the brilliant scintillation, which are continually eminating from prepared plates of radium and thorium. These plates were procured in Paris and London prior to the war and are of unusual brilliancy. The tests were made by Mr. H. M. Shreiner, of Brooklyn, and his report shows quite conclusively that colored glass 2 m/m thick even if shade 6 can not be depended upon to obliterate these brilliant flashes of light. Table 9, electric glass No. 3, a dense smoke about shade No. 10, gave the best results, but in 15 minutes' time bright flashes were quite...show more

Product details

  • Paperback | 24 pages
  • 189 x 246 x 1mm | 64g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236890515
  • 9781236890511