162 Mining Terms. 
A GLOSSARY OF MINING TERMS. 
Aceguia. A ditch. Spanish. 
Apit. A horizontal drift or other passage used as 
an opening or drain to a mine; applied to no level ex- 
cept one opening on the surface. Latin.. 
ADVENTURER. A shareholder. 
ALLigaTor. A rock breaker operating by jaws. 
AutuviuM. The sediment of streams and floods. 
Latin. 
AmaAuGaM. The mechanical combination of quick- 
silver with gold or silver. 
Apex. The top of a vein. Latin. 
ArastrA. A circular mill for grinding quartz by 
trituration between stones attached loosely to cross 
arms. Sp. 
Arcu. A part of the gangue left standing for sup- 
port. 
ARGENTIFEROUS. Silver-bearing. Lat. 
Ascension THxEory. That refering the filling of 
fissures to matter from below. Von Cotta. 
Assay. A test of the mineral contained in a larger 
mass by extracting and weighing the product of a sam- 
ple. / 
ASSESSMENT Work. The annual labor ($100) re- 
quired to hold a location. 
AttTLE. Waste rock. Cornish. 
AuvrIFERovus. Gold-bearing. Lat. 
_ Bacx. The roof of a drift, stope or other work- 
ing. 
Bat. Amine. Corn. 
Bank. The surface at the pit’s mouth. (2) Dump. 
BANKSMAN. The man at the shaft mouth who 
handles the bucket. Corn. 
