Resource Type

Month

Compressor. (open access)

Compressor.

Patent for a refrigerating machine compressor, which compresses more gas, cools the compressor with the incoming gas, and uses excess heat to dry the gas coming in.
Date: April 19, 1910
Creator: Mayhew, John Daugherty
Object Type: Patent
System: The Portal to Texas History

2007 Economic Census Map: Dallas-Fort Worth, Texas Combined Statistical Area

Map showing the area of the Dallas-Fort Worth, Texas Combined Statistical Area for which the U.S. Census Bureau collected data during the 2007 economic census.
Date: 2007
Creator: United States. Bureau of the Census.
Object Type: Map
System: The Portal to Texas History