Carnegie Institution of Washington Publication Volume 71

Carnegie Institution of Washington Publication Volume 71

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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. 1907 edition. Excerpt: ...hazy contour extends as far as 0.41;; with its maximum at about 0.34;. Transparent from 0.4I; to 0.63;. 54. Bismarck Brown. (A.) Hydrochloride of benzene-disazo-phenylene-diamine. Fig. 7, pl. 2; N0. 197, S. & J. Dark-brown powder. In solution brown, yellow. 30 g. per liter (filtered). Angle 19.5'. Depth 0 to 0.18 mm. Visible and photographic absorption identical with that of solution No. 12. 56. Congo Orange G--Continued. 59. Congo Red. (A.) Sodium salt of 0.405;. and 0.44;.. A weak, hazy band begins at 0.44;. and continues to 0.475;., at which point it joins a more intense band. The latter has its maximum at 0.505;. and then decreases to transparency at. 0.53;.. Transparent from 0.53;. to 0.63;.. More concentrated solutions emphasize all the maxima of absorption just outlined and the minimum at 0.42;1. 57. Chrysamine G. (A.) Sodium salt of diphenyl-disazo-bi-salicylic acid. Similar to fig. 36, pl. 9: No. 220, S. & J. Yellowish-brown powder. In solution brownish yellow, faint yellow. 7 g. per liter (heated and filtered). Angle 35.1'. Depth 0.26 to 0.58 mm. N0 visible absorption unless, perhaps, a faint weakening of the extreme violet. Somewhat similar absorption to that of the more dilute solution of No. 77. For the layer used the absorption is nearly complete from 0.20;. to 0.29;.. The continuous background is transmitted from 0.29;. to 0.30;.. The limit of the ultra-violet absorption is approximately a straight line joining the wave-lengths 0.365;. and 0.395;. at the opposite edges of the negative. Transparent from 0.395;. to 0.63;.. More dilute solutions and wedges of liquid tapering to infinitesimal thickness show that ultra-violet absorption is very weak. 58. Cresotine Yellow G. (M.) Sodium salt more

Product details

  • Paperback | 26 pages
  • 189 x 246 x 1mm | 68g
  • United States
  • English
  • black & white illustrations
  • 1236756185
  • 9781236756183