130 MINERAL REPOSITORIES. and a half; the Mordlauer flach vein in the Fich- tfclgebirge, 9000 fathoms; and rhe Friedenfgrub- ner-flach vein, in the fame mountains, 5000 fa thoms. Greenftone and pitchftone veins may be traced lome miles in this country, as in the ifland of Arran. 3. Depth of veins.—Few veins reach above 200 fathoms below the furface of the mountains in which they are fituated, and ftill fewer continue metalliferous to the depth of 300 fathoms. The following are inftances of veins which are metalli ferous at the depths mentioned : The Kiichfchat vein near Freyberg, at - 207 The Junghohebirke vein near Freyberg, at 138 The Thurmhofer vein, alfo near Freyberg, at 300 The Samfon vein at Andrealberg, at - 250 The Thurmhofer-fhaft at Claufthal, at 3x2 The deepeft fhaft on a vein is that at Kiit- tenberg in Bohemia, - _ 4. That part of a vein which appears at the fur face of a mountain is denominated its outgoing or crop 1 the diredly oppofite boundary its bottom; and the lateral extremities, its ends. Thofe planes that bound the vein according to its greateft ex tent, are termed its faalbande or fdes. 5. Veins continue in general in one direction. It muft be underftood that we here allude to the ’ general direction. A vein of a mile in extent may ftretch north and fouth in general, but there may be