Occurrence, Availability, and Chemical Quality of Ground Water in the Cretaceous Aquifers of North-Central Texas: Volume 2 (open access)

Occurrence, Availability, and Chemical Quality of Ground Water in the Cretaceous Aquifers of North-Central Texas: Volume 2

The second volume of a two part report on the Creataceous aquifers in Texas. This volume contains information on water wells, water levels, and chemical analyses.
Date: July 1982
Creator: Nordstrom, Philip L.
Object Type: Report
System: The Portal to Texas History
Electromechanical Switch Thrower (open access)

Electromechanical Switch Thrower

Patent for an electromechanical switch thrower. Illustration included.
Date: July 31, 1906
Creator: Posey, James A.
Object Type: Patent
System: The Portal to Texas History