Assertion: windmill's patent sail | /r/HasProperty | double
Facets:
value: originally
type: MANNER
Source sentences:
text: It was last worked with four double patent sails carried on a cast-iron windshaft, with the two pairs of millstones arranged side by side in the breast of the mill, driven underdrift by spur gearing.
text: It carries four Single Patent sails (originally double Patents, later cut down), and a wooden 8 feet (2.44 m) diameter clasp arm brake wheel of oak and elm with 99 iron segment teeth.