Sanborn map sheet showing an area of Huntsville in Walker County, Texas, including geographic features, buildings, and details related to risk assessment for fire insurance.

Sanborn map sheet showing an area of Huntsville in Walker County, Texas, including geographic features, buildings, and details related to risk assessment for fire insurance.

Patent for improvements in steam-pumps, of which “are adapted to compress a liquefiable gas—such as that of ammonia—to a state of partial liquefaction, the pressure being subsequently removed and the liquefied refrigerating agent expanding through tubes and chambers, and the cooling effect produced by the volatile liquid again assuming its gaseous state is utilized for the absorption of heat.” (Lines 10-17) Illustration is included.

Patent for improvements in pistons for pneumatic pumps by using a combination of a tubular shell, a cylindrical valve, a conical aperture and a conical projection to fulfill the conditions required of a piston in pumps. Illustration is included.