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P.L. 94-171 County Block Map (2010 Census): Henderson County, Index
Index map for Henderson County, Texas showing the distribution of census blocks and smaller inset areas for which the U.S. Census Bureau collected data. The plotted map scale is 1:138,173.
Date:
January 12, 2011
Creator:
United States. Bureau of the Census.
Object Type:
Map
System:
The Portal to Texas History
Four-Wheel Drive
Patent for a four-wheel drive with a combined central driving unit and differential that simplifies construction and improves efficiency in operation.
Date:
January 25, 1921
Creator:
Littlejohn, Lonzo B.
Object Type:
Patent
System:
The Portal to Texas History
Cooler.
Patent for an "iceless cooler" (line 13) with key features such as low manufacturing cost, easy assembly, and the capability to be collapsed for compact storage when not in use, including illustrations.
Date:
January 26, 1918
Creator:
Chapman, T. M.
Object Type:
Patent
System:
The Portal to Texas History
Self Cooling Journal Box.
Patent for a new and improved journal-box. This design consists "[i]n a self-cooling journal-box, the combination of the walls having top and bottom supporting the lubricating packing, and the housing forming water-chamber below and at the sides of the chamber formed by the walls and bottom, and [another] water-chamber above the top" (lines 66-72).
Date:
January 29, 1889
Creator:
Storey, Julius W.
Object Type:
Patent
System:
The Portal to Texas History
Cotton Sweep.
Patent for a new and improved cotton-sweep. This design "has for its object to provide a sweep which can be used either as a solid sweep or with one wing solid and the other cut away; to so construct the cut-away wing that it can be run very close to the plants without injuring them or throwing too much dirt or earth thereon to cover them, and to provide a sweep which shall be cheap, strong, durable, and effective" (lines 27-35).
Date:
January 19, 1886
Creator:
Awalt, Jesse C.
Object Type:
Patent
System:
The Portal to Texas History