On Shis suggestion another 21cwt was broken up pretty fine with the hand hammer, assayed for a result of 104oz. Part of ib was pub in bho iron pipes (same as used by him and other amateurs ab a previous treatment of the Projectors' ore). A big ®

LAYER OF COMMON SALT was laid at tho bottom of the pipe, covered over with a bag. Tho pipe, I may explain, was stuck end on in tho kiln at an angle of about 30 degrees, the top closed in very tight, and heat applied gradually until all the water was drawn oft ab the bottom through-the salt in bhe shape of dense sulphurous steam. After tho steam ceased escaping; tho bottom end was securely fastened, common salt put in, and both ends securely fastened, boated very strong for somo hours;'then the fire was taken away and the tube allowed to cool, and again assayed for 103 ounces per ton treated through pans same as previous lots. Result, 89 por cent, on assay value of retorted silver. Eureka ! Eureka ! THE PHILOSOPHER'S STONE AT LAST. Ib is scarcely necessary to add that the flab sheets were pub on one side as obsolete, and bhe pipes only, crude and awkward as they are, kept going until the 21cwt was all put through, with almost the same un varying result. The assay was lo3oz per ton, and retorted silver at tho rate of 920z saved—a magnificent and splendid percentage. Ail tho tailings lying about the battery house were put through tho four pans, and litters thoroughly cleaned up, and Mr Whitelaw and his friends brought in, as already telegraphed to you, 8430z silver. There are no two opinions now that our Puhipuhi ore is nob" a free milling oro in the strict sense of tho word. What bullion in roasting that may exist in the shape of a chloride is of course melted along with a minute portion of sulphide and converted, into metallic silver. This ore treatment is seized upon by the mercury, but what remains, if any, in the centre of the stone that the firs has not reached, is lost in the tailings. Of course the mercury won't look at lb,, but tho secret is in bhe firing. 