The theory and practice of the drill husbandry. Founded upon philosophical principles, and confirmed by experience ... Illustrated with exact drawings of all the respective parts, and a perspective view of each machine compleat, on nine copper plates, whereby every farmer will be enabled to make his own drill machines / By William Amos.

Licence: Public Domain Mark

Credit: The theory and practice of the drill husbandry. Founded upon philosophical principles, and confirmed by experience ... Illustrated with exact drawings of all the respective parts, and a perspective view of each machine compleat, on nine copper plates, whereby every farmer will be enabled to make his own drill machines / By William Amos. Source: Wellcome Collection.