1. Veins of elvan; elvan courses, or elvan channels.
2. Tin veins, or tin _lodes_; the latter word being used by the Cornish
miners to signify a vein rich in ore, and the word _course_, to signify
a barren vein.
A Dictionary of Arts, Manufactures and Mines containing a clear exposition of their principles and practice · 第 110 / 421 题