Improvement in Cultivators. (open access)

Improvement in Cultivators.

Patent for the improvement of the rotary cultivator with adjustable thinning-points and rotating cutter, including illustration.
Date: April 10, 1855
Creator: Morrel, A. H.
System: The Portal to Texas History
Improvement in Plows. (open access)

Improvement in Plows.

Patent for the improvement of the Rotary-Disk Cutters for plows that enable it to swivel and be supported by guides, including illustration.
Date: April 3, 1855
Creator: Hall, Thomas J.
System: The Portal to Texas History