SUMMERLEE, a village, in the parish of Old-Monkland, Middle ward of the county of Lanark, 2 miles (W. N. W.) from Airdrie; containing 6'2.5 inhabitants. This village is situated in tiie eastern part of the parish, in a district abounding in coal and ironstone; and is the seat of several blast-furnaces, in connexion with which the population is almost exclusively employed. Messrs. Wilson and Company arc proprietors of the great iron-works here; and this village and Gartsherrie are the only places of the many in the parish where similar works are carried on, in which the furnaces are not in operation on the Sabbath-day. A great quantity of the Rochsilloch ironstone, so well known for its excellence, is wrought by the Summerlee Company; and a white freestone is quarried in the neighbourhood, chiefly for their use.