Groom Quadrangle

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 1:24,000
Date: 1983
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Lark Quadrangle

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 1:24,000
Date: 1983
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Claude Northeast Quadrangle

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 1:24,000
Date: 1983
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Conway Quadrangle

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 1:24,000
Date: 1983
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Washburn Quadrangle

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 1:24,000
Date: 1973
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Grandview School Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

White Deer Southwest Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Panhandle East Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Panhandle West Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Sevenmile Basin Quadrangle

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 1:24,000
Date: 1973
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Kingsmill Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

White Deer Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Cuyler Quadrangle

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 1:24,000
Date: 1978
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Abell Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Pomeroy Quadrangle

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 1:24,000
Date: 1953
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Lake Mcconnell Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Skellytown Quadrangle

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 1:24,000
Date: 1978
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Borger Southeast Quadrangle

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 1:24,000
Date: 1978
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Mcbride Quadrangle

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 1:24,000
Date: 1978
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Deal Quadrangle

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 1:24,000
Date: 1953
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Skellytown Northeast Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Skellytown Northwest Quadrangle

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 1:24,000
Date: 1991
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History

Phillips Quadrangle

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 1:24,000
Date: 1978
Creator: Geological Survey (U.S.)
Object Type: Map
System: The Portal to Texas History
Port-Regulating Valve. (open access)

Port-Regulating Valve.

Patent for a port-regulating valve. It is meant for use in steam-engines and regulates the steam in engines that the inventor had previously patented (No. 523,360). "The invention consists of a slide-valve for covering each port leading from the steam-chest to the rock-valve, with means for operating such slide-valves from the shaft controlling the rock-valve, and a link movement for adjusting the throw of the slide-valves and which is under the control of the engineer" (lines 21-28).
Date: August 27, 1895
Creator: Lester, Frank
Object Type: Patent
System: The Portal to Texas History