y of water, equal to the run of 3/4-inch pipe to each set of five stamps, passing through screens in the back and front of the box. These screens are made of thin Russia iron perforated with holes punched by sewing-needles.
Auriferous sand is treated in divers amalgamating machines; it being already in a comminuted state, it isls's annealing furnace.
The attrition of the particles during the operations of heating and cooling is to give the peculiar mottled and polished appearance of Russia sheetiron.
Wood's annealing furnace.
In wood's annealing furnace, 1867, the box has track wheels.
Its lower plate has an upwardly projecting rim to hold ts performances.
Large telescopes, equatorially mounted, are in the observatories of Cambridge, Eng., Cambridge, U. S., Chicago, Albany, Alleghany, and Pulkowa, Russia.
The equatorial of Melbourne, Australia, is a reflector.
1. An astronomical instrument composed of two cones, on whose surfa