Sc. In 8 calm-.
a. ‘Common compact limestone probably of a white colour’ (Jam.). b. A white or bluish-white clay used to whiten hearths, door-steps, etc.
1791. Statist. Acc. Scotl., I. 209. There is calmstone and plenty of ruddle. Ibid. (1795), XV. 327 (Jam.). At the base of the hill … you meet with several layers of camstone.
1815. Scott, Guy M., xxxvi. A pail of whiting or camstane, as it is called, mixed with water—a circumstance which indicates Saturday night in Edinburgh.
1806. Forsyth, Beauties Scotl., III. 359. The third kind of limestone is … camstone or glenstone…. It contains a considerable proportion of clay.
