The face of the regulator is now placed on the ground glass after smearing it with oil and oilstone dust.
Jed whistled a few mournful bars and sharpened a chisel on an oilstone.
The handle of the tool should be grasped in the left hand, while its blade rests on a block of wood, or on the oilstone.
Synonyms are honestone, whetstone, oilstone and sharpening stone.
This mistake is sometimes made in using the oilstone, by rubbing the tool on both sides instead of on one only.