Description: Patent for a subsoil attachment for plows in which the attachment can be “held fixedly relative to the plow so as to be maintained constantly at the desired depth without pushing upwardly under the resistance offered by the soil. This attachment can also be adjusted easily to plow to the desired depths.” (P. 1, lines 15-22.) Illustration is included.
Date: October 14, 1913
Creator: Mathis, William R.
Partner: UNT Libraries Government Documents Department