GLOSSARY. ?6$ 



ROTTEN REEF In S. Africa, a soft deposit found in connection 



with auriferous conglomerates. 



ROUGHS The second, or inferior quality, of cross tin. 

 RUN Course of a vein. Ore is spoken of as running so much metal 



per ton. 



SALAMMONIAC Chloride of ammonium. 



SALTING A MINE Introducing mineral matter in a mine to deceive 



purchasers. 



SAMPLE Specimens of ore for assaying. 

 SCAD (America) Uncommon name for a nugget. 

 SCALL Loose ground. 

 SCHISTS (See Index). Term applied to certain slaty rocks (chiefly 



metamorphic). 

 SCORIFIER A shallow fire-proof vessel used in gold and silvei 



assaying. 



SCRIN Smallest kind of vein. 

 SEAT Bottom of a mine. 

 SECONDARY ROCKS Those older than the Tertiary and newer than 



the Primary. 

 SECTILE Easily cut. 



SEDIMENTARY ROCKS Deposit of sand, clay, &c., from water. 

 SHAFT A vertical or inclined excavation in a mine. 

 SHAKES Caverns in lead mines. 

 SHALE A schist imperfectly formed. 

 SHELF The rock on which drifted matter rests. 

 SHEPHERDING (Australia) Doing just as little work on the mine as is 



required by mining law. 



SHIFT Time during which men work in a mine. 

 SHOOING Tracing pieces of detached veinstones to the parent lode. 

 SICKENED MERCURY See * Floured Mercury." 

 SILICA (oxide of silicon) Quartz, flint, sand, &c., are nearly pure 



silica. 



SILICATE Combination of a base with a silicic acid. 

 SILICEOUS Containing silica. 

 SILURIAN (See Index) . 



SINK An excavation under a level. To " sink " is to excavate down- 

 wards in a mine. 



SINTER (Siliceous) A silica formation deposited from thermal waters. 

 SLAG Vitreous mass which covers the fused metal in the smelting 



hearths. In ironworks it is called cinder. 

 SLICKENSIDES Name given to smooth striated surfaces of rocks or of 



mineral lodes. 



SLIDE A fracture of strata, or displacement in a mine. 

 SLIME ORE Finely crushed ore mixed with water to the consistency 



of mud or slime. 

 SLOVAN The " cropping out " of a lode or strata. 



