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Improvement in Rotary Engines.
Patent for improvements in valves used in rotary engines.
Date:
May 9, 1871
Creator:
Hughes, Robert
Object Type:
Patent
System:
The Portal to Texas History
Morris County
Map of Morris County, Texas, including the Piney Woods region. Scale ca. 1:133,334 (4000 varas per inch).
Date:
October 1879
Creator:
Groos, Otto
Object Type:
Map
System:
The Portal to Texas History