Aërial tramways, [112]
Amalgam, Retort for small quantities of, [142];
squeezing, [155]
Amalgamation of gold, [30]
Amalgamators, [91-93]
Aneroid barometer, Use of, for leveling, [160], [161]
Antifriction compound, [165]
Aqueous origin of ore deposits, [36-38]
Assay apparatus, Simple form of, [14], [15]
Assaying gold by amalgamation, [30]