Interior of Grist Mill

C.W. Jefferys' notes about this picture from The Picture Gallery of Canadian History Volume 2

The beautifully carpentered crane resembles an engraving in Oliver Evans's Young Mill-wright's Guide, but is more elegant in design. In order to keep the mill-stones sharp, it was necessary, from time to time, to deepen the furrows and dress the surface afresh. By means of the upright iron screw and the rappling tongs the crane was used to lift and turn over the upper stone. The furrows were then deepened by steel picks. To test the levels of the stones and ensure equal contact, a wooden bar whose edge was smeared with red earth moistened with water was drawn across their surfaces. The higher parts where the red smear was seen were then dressed off until the whole surface was perfectly level.