New Gold-saving Machine for the Moanatairi.

Thames Star, Volume XII, Issue 3493, 5 March 1880, Page 2

New Gold-saving Machine for the Moanatairi.

Some time ago Mr Denny; the inventor of JDenny's patent pulveriser, a new gold saving machine, was on a visit' to this colony, canvassing for orders for his invention. One was ordered by the Moanatairi G.M. Co., and is expected to arrive here in a day or so.- This new gold saying appliance is advancing in favor in Australia and in all the principal goldfields, and are considered indispensible adjuncts 'to the paraphernalia of a large crushing battery. A gentleman who has just returned from Sydney informs us that it" is estimated by the patentee that his process safes 90 per cent, of the gold. By the present process there is generally no less a loss than 40 per cent., which, of course, enriches the tailing workers. This estimate of the value of the machine was subsequently corroborated by a Queensland mining man, who praised, it more warmly even than the inventor. The pulveriser is a system of three berdans, each working on separate axles, but arranged one above the other. The upper pan is no longer than an ordinary battery berdan, the second being larger, and the bottom one larger again. These pans are all supplied with drags and balls, and have ripples attached, those of the two lower pans being "silvered." When at work the speed of the small berdan is much greater than that of the large one, the latter being supplied with a small pulley. The tailings pass from one berdan to the other, the bulk of the gold being taken from the ripples. The only draw back to the otherwise excellent invention 1 is the length of time taken to do justice to even a moderately-sized parcel. However we wiil soon have it working in our midst, and if it comes up to expectation, others will doubtless be obtained for other batteries. We understand that i the cost, complete, is £200. One of the machines were to have been worked in I the machinery annex of the Sydney i Exhibition, but owing to a dispute about | space and motive power, the idea was ' abandoned. The Thames tailings which I were to be ground at the exhibition will be sent to Bnthurst and there expcrimen- | ted upon.