51�Թ�

Whatever may have been the solvent and precipitant of the nobler metals in the auriferous veinstones associated with trap intrusions, all other but hydrothermal action may safely be eliminated, the very nature of the reefs, composed as they are of alternating layers of a promiscuous mixture of quartz, calcspar, pyrites, etc., affording unmistakable evidence on this point.

The materials employed are sand, sulphate of soda, nitrate of soda, calcspar and in some works carbonate of barium.

Noted spelling variants that were preserved include: "aluminum" and "aluminium;" "ampullas" and "ampullae;" "beechwood" and "beech-wood;" "Bl�tstein" and "Bl�t stein;" "brick dust" and "brickdust;" "calcspar," "calc spar" and "calc-spar;" derivatives of "crossbar" and "cross-bar," and similarly for "crosscut," "crosspiece," etc.;

The limestone at this locality is white and saccharoid, with large rhombohedral crystals of calcspar.

Rock salt may be cloven with equal facility in three directions at right angles to each other; that is, it may be split into cubes; calcspar may be cloven in three directions oblique to each other; that is, into rhomboids.