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New Zealand Herald, Volume V, Issue 1399, 12 May 1868, Page 2

Masonic. —The monthly meeting, of Lo4ge St. John w?!l be held at the Lodge room, Criterion Hotel, this evening at 7 o'clock. Paenell Hall. — The total abstainers of H.M.S.S. Brisk will give an entertainment this evening, at the Parnell Hall. Tea on the table at half-past six o'clock. This is something novel, and we hope thait the Auckland people will supperi; it cordially. Auckland Club.—On reference to our advertising columns it will be seen that the Club trill be open for the use of members on' Thursday next.

Wobk foe the Unemployed.—ln another column will be found an advertisement for twenty navvies and two carpenters, at the Kawa-kawa coal-mines; another sign of the progress of the times. Applicants for employment are referred' to J.. A. Gil fill an, Esq., Secretary to the Company. Wesley an Sunday School Union.—The anniversary tea meeting of this L iiion will be held to-morrow (Wednesday) evening, in Pittstreet school-room, at six o'clock. SSAfter tea, addresses will be delivered by several ministers and other friends of the Society.

Me. F. Kissling advertises that he has commenced business as Share broker, Land and Commission agent, at the offices, 74 Queenstreet.

Developing the Gold-fields.'—The new chemical discovery for saving the fine gold which is at present lost, and which we hare no doubt will shortly astonish the public by.its results, will inevitably have the effect of giving great additional impulse to the erection of quartz crushing machinery. Amongst the various sorts we have recently read of, is one by which the stampers are worked by-air, an I ."ailing at the rate of 200 tons per minute. Another has a series of bell-mouthed cones, where the quartz is torn up and reduced to powder by ribs and grooves cast in the month of the mill to pass through or between the plain surface of the cones, which are constructed of cast iron, fitted closely together, so as to bruise every grain, where it will be kept by regulating the quantity of water that is left in with the work, and confining the work by the adjusting ring at the outer edge of the mill, whioii is perforated for the purpose. Another quartz crusher or disintegrator has a series of four strong cylindrical iron cages, of various sizes, concentrically arranged one within another on a horizontal axle on which they are caused to revolve Avitli great rapidity in contrary directions to each other by meaus ofau open and a crossed strap, the alternate cages being so arranged as to intersect one another, so that while the actual motions are only in two directions there are relatively four —the first and third cages rotating to the right, tiip sppond and fourth to the left, one set being in a piece with the hollow axle or boss on which the cross strap is placed, and the other set keyed on to a solid shaft working within, on the outer end of wliieh is the pulley of the open strap. The outer ring or cage goes at the velocity of about a mile and a half per minute. This machine with a 40-horse power eugine is capable of turning into powder from 30 to 40 tons per hour, immensely exceeding in amount what the same engine could do with edge runner nulls or parallel rolls, and incomparably better done also. For the information of those interested m such matters, we may state that in course of a mail or two a gentleman in Auckland expects working drawings of the above machines.