Crane.| Prospecting, Mining and Milling Machinery. 297 
The minerals thus separated from the waste material and 
other foreign matter are brought under the action of the jet 
of water, A, which is;just strong enough to remove the lighter 
mineral, leaving the other on the table, which in turn is re- 
moved by the jet from B. 
There;is then no cessation in the separating operation, and 
consequently no time is lost in cleaning the table. 
SETTLING 
Fig. 735. Settling tank and stay box used with power jigs. 
Plan and side view. 
SETTLING TANKS OR SLIME AND SAND CLASSIFIERS. fy 
Settling tanks or classifiers are accessories to the cleaner 
jig, and catch a large amount of the material which escapes 
from the same. The form used in this district, although 
