The following is a copy of a letter addressed by the International Commission to Dr Hector, as executive commissioner for the New Zealand Commission :— Intori aMonal Exhibition, 1879. S>diey, 4th June, 1879. Sir, — I have the honour to inform you that there will be nhown in operation at the Exhibition, ma chinery and a method on a working 1 rcale for extract ing the p r eoious metals, not only from untriatei tailings, but also from tnose which bave been treated by the ordinary processes, and in which a notable per centage of gold or silver has been left. There is every reason to believe that the machinery and method referred to will save at leaßt 60 or 60 per cent, of the gold left in tailmes, which have been through the grinding operation of machines such as Wheeler's or Bordan'a pans, or of Arrastr.s ' The pr"ce-s is a cheap one, and does Hot necessity the use of smelting or reverberating furuac b, and it ought greitiy to increase the production of gold in New Zealand. I have been applied to by the inven tors to ask th« New Zea'and Commission, end, through it. private persons, to forward simples of n«"t less than 1 cwt eich for treatmeut at the Extilbitt n Those eampies are most sought after from which in practice it. has been found most difficult to extract the %o\<£ The operations will be endncttd under the super vision of officers of the C mmission, and careiul analyses of the foiling* will be made in all stapes There will be no charge, bi tit ia proposed tbat the gold extracted should be re v »inei by the owners of the exhibited machinery. It has been explained to me that, Mdfferent simp'e* of tailings may requ re in some rcsoec*a different, although equally inexpensive, trtat mtnt., that 20 lbs of eacn, whether previously treited or untreated, tailings con'ai ling payable quantities of gold shou'd be ferwarded beforehand, so that an analysis of each may be made before th 1 Exhibition opens If the<-e ssmp'es are sent to ma, I will have ihem forwarded.— l hive, &c, Augustus Morris, Seoretary, Dr Hector, O.M.G , Wellington, Mew Zea'and.
