
A plug drain.
Engraving depicting a plug drain - used in clay soils. Wooden plug as placed in the bottom of the newly excavated drain, clay was replaced and pounded down. The plug was then withdrawn, leaving a drainage hole. Dated 19th Century.
Credit
Universal Images Group
Dimensions
6518 x 3217 pixels
Print Size @ 300 dpi
22 x 11 inches / 55 x 27 cm