Drumlins are mounds of boulder clay and are characteristic features of the minor topography of Southern Scotland. The word drum or drumlin as the name of these drift hills is indigenous both in Scotland and Ireland. It is common in Scottish place-names as in Drymen, Tyndrum, and Drumadoon. J. Jamieson's Etymological Dictionary of the Scottish Language (1880, vol. ii, p. 116) defines a drum as a knoll or ridge, and refers to its use in the Statistical Account of Scotland as early as 1797. Joseph Wright, English Dialect Dictionary (1900, vol. ii, p. 190), attributes drum to Scotland, but quotes drumlin from Ireland in Antrim and Down. Its first use as a technical term in geology appears to have been in Ireland by Scouler in 1833, who applied it to eskers and to mounds of boulder clay; its restriction to the latter is due first to Maxwell Close (Journ. Roy. Geol. Soc. Ireland, i, 1866, pp. 212, 213.)