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Oil-Converting Apparatus.
Patent for an apparatus that can be built at moderate cost, which will enable a high rate of commercially efficient work to reduce "the specific gravity of various grades of hyrdo-carbon oils, especially those of a semi-refined character" (lines 22 - 24).
Date:
October 28, 1919
Creator:
Adams, Joseph H.
Object Type:
Patent
System:
The Portal to Texas History
[Letter from the Institute for Research in Biography to D. W. Kempner, September 28, 1949]
Letter from the Institute for Research in Biography to D. W. Kempner regarding a Press Proof of his biography, asking him to review it and make any changes or corrections as required. A "Special Publication Offer" card is attached.
Date:
September 28, 1949
Creator:
Institute for Research in Biography
Object Type:
Letter
System:
The Portal to Texas History