Chispa Sheet

Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:125000
Date: 1895
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Sierra Blanca Sheet

Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:125000
Date: 1895
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Chispa Sheet

Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:125000
Date: 1897
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Fort Hancock Sheet

Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:125000
Date: 1894
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Eagle Mountain Sheet

Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:125000
Date: 1897
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History
Artesian Well Borer. (open access)

Artesian Well Borer.

Patent for a new and improved artesian-well borer. This design "will be actuated by the weight of the connecting-rods and sink-wells in rock, gravel, earth, or sand without the use of water" (lines 13-16). It consists "[i]n an earth or rock auger, the combination, with a tube and a shank reciprocating in said tube and adapted to operate the auger, of dogs adapted to be projected through the tube by the reciprocation of the shank to engage the well-casing and hold the said tube from rotary movement" (lines 62-68).
Date: January 20, 1891
Creator: Logan, Thomas H.
Object Type: Patent
System: The Portal to Texas History