GLOSSARY. JS5 



BLIWD LODE One that does not show surface croppings. 



BLOCK CLAIM (Australia) A square claim whose boundaries are 



marked out by posts. 



BLOCK REEFS (Australia) Those with longitudinal contractions. 

 BLOCKING OUT (Australia) Washing gold-bearing matter in square 



blocks. 



BLOSSOM ROCK Coloured vein stone detached from an outcrop. 

 BLUE ELVAN Greenstone. 

 BLUE JOHN Fluor spar. 



BLUFF A high bank or hill with a precipitous front. 

 BONANZA A large and rich body of ore. 

 BONGKAL (Straits Settlements) A gold weight = 832-84 grains 



20 bongkals = I catty. 

 BORNASCA An unproductive mine. 

 BOTRYOIDAL With surface of rounded prominences. 

 BOTTOM Bed rock. 

 BOULDERS Loose rounded masses of stone detached from the parenl 



rock. 



BRANCH Small string of ore in connection with the main lode. 

 BRECCIA A rock in which angular fragments are cemented together. 

 BROWNSPAR A kind of dolomite containing, in addition to the car. 



bonates of lime and magnesia, some carbonate of iron. 

 BROWNSTONE (Australia) Decomposed iron pyrites. 

 BuCKSTONE Rock not producing gold. 

 BUNCH A small rich deposit of ore. 

 BURETTE A graduated glass tube provided with a stop cock, by 



means of which a certain quantity of liquid is allowed to drop out. 

 BUTTON Name given to the globule of metal which remains in the 



cupel after fusion. Also applied to the globule of a metal left in 



the slag from the scorification process. 

 BYON Ruby-bearing earth in Burmah. 



CACO (Brazil) A white quartz. 



CAGE Elevator for hoisting and lowering the miners, as well as ore, 



&c., in the mine. 

 CAIRNGORM A variety of quartz, frequently transparent : used as an 



ornament. 



CA JON (Bolivia) 50 quintals. 

 (Peru) = bo 

 (Chili) =64 



One marco of gold per cajon of ore =: 2 oz. 14 dwt. per ton. 

 CALCINE To drive off volatile matter by exposing the substance to a 



gentle heat, &c. 

 CALCITE Carbonate of lime. 

 CAMBRIAN Name given to the oldest (except the Laurentian) of the 



stratified rocks. Found in Wales. 

 CANGA (Brazil) A kind of auriferous glacial rock. 



