Sheppard's 1925 paper of gelatin and sulfur compounds

Discussion in 'Silver Gelatin Based Emulsion Making & Coating' started by Kirk Keyes, Jul 8, 2008.

  1. Kirk Keyes

    Kirk Keyes Member

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    Does ayone have a copy of Sheppard's paper from 1925 on gelatin and sulfur compounds? It's old enough that copyright no longer applies and it would be nice to see it online.
     
  2. Photo Engineer

    Photo Engineer Subscriber

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    It might be found as the patent. Otherwise it woudl be in the SPSE archives.

    PE
     
  3. Kirk Keyes

    Kirk Keyes Member

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    Must be Patent 1591499 then, from 1925.
     
  4. Photo Engineer

    Photo Engineer Subscriber

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    I looked Kirk and that is it. Notice how useless it is in regard to what is actually done now? In fact, the mustard oils were merely disclosed to disclose the use of sulfur. The real methodology was to use the C=S bond and that was found in thiourea, thiocyanate and other compounds.

    PE