A New Gold-Saving Apparatus.

Progress, 1 November 1905, Page 15

A New Gold-Saving Apparatus.

It is a fact well known amongst dredging men that m spite of the utmost care upon the part of dredgemasters a very large percentage of alluvial gold escapes m the treatment of the wash. A great many contrivances have been invented with the object of preventing this very serious loss, but none of them so far appear to have come up to the full expectations of their inventors. A new apparatus, which is certainly worthy of a trial, is the joint production of Messrs. Bnttm, Magnus and Le Cren. As shown in our illustration the apparatus com-

prises a trough, A, into which is delivered the fine material brought up by the dredge buckets, the separation of the fine from the coarse material being effected by a shaking riddle, B, which is inclined towards the trough. Within the trough is a constantly revolving archimedean screw which constantly agitates and moves the fine material from one end of the trough towards the other. Upon each side of the trough are the inclined saving tables, C. fitted with the usual gold-saving plush or the like. Nozzles, D, from the trough deliver the fine material upon the upper ends of the tables. The nozzles are adjustable to regulate the quantity of material delivered, and a very large spread of saving surface is obtained by superposing the tables. Dr. F. G. M. Brittm, Papanui, Chris tchurch, is the inventor of this apparatus.