The Alaska daily empire., 1917-02-13
CONFIDENCE IS
 UNLIMITED IN
 CHANNEL MINES
Editor Secures a Most Comprehensive Statement From
 Mackenzie

| " Mining and Scientific Press by John Fl. Mackenzie. and appearing in that publication January 27th The inter view was secured by T. A. Ricard, editor of the Mining and Scientific Press, personally.
 The interview outlines the activi, ties of the career or John IT. Mack enzie as a mining man, and, the Min ing and Scientific Press says, dis closes that he is a real mining man and not simply q make.belieye..
 Mir. Mackenzie became interested in the Alaska Juneau mine through his association with F. W. Bradley, president of the owning company and of the Treadwell companies. He be- came associated with Mir. Bradley early in the prevent century when he resigned as manager Of the Le Roi mine in the Rossland B. C, dis. trict. because he wished 10 return to the United States. though Cam adlan by birth. and went to San Francisco.
 On account of difficulties in which 1t had got. Mir. Mackenzie went back 60 the Le Roi mine in 1905 and stayed there two years, pulling it out of the hole. He then went tO Gold field and became manager of the GoldGield Consolidated for two years, performing an office for that mine similar to the one he had performed for the Le Roi. After spending a little over two years at the GOldtield Consolidated. Mir. Mackenzie returned to San Francisco and again joined Mr. Bradley and Mir. Requa.
 The portions of Mir. Mackenzie's in terview that are of particular intet- est to Alaska readers follows:
 "I joined F W. Bradley, here iu San Francisco, in the work of exam ming and managing mines, and w. continued 10 do that for several years. Between 1903 and 1905 Mark L.. Requa joined Bradley and myself and we did a general consulting business. At that time ReQua ad la option on what is now the Ruth portion of the Nevada Consolidated. Bradley and I joined him in the en- terprise. All of us spent a good deal of time at Ely, and made the necessary tests. by drilling and mill. ing. to determine the value Of the property. Requa was in direct charge Of the work. which led 10 the organization of a company, by James Phillips and W. Hinkle Smith, called the White Pine Copper Co. That was in November, 1904. Out Of this and the Boston & Nevada Copper Co. grew the Nevada Consolidated. which has proved such splendid property"
 You returned 10 consulting prac- tice in san Francisco" asked the interviewer?
 No. All three Of us-Bradley. Requa and myself-were so absorbed in enterprises in which We had placed our own money that we did not look for clients However, my work at the Alaska-JunCau has been Of con. sultative kind.
 Bradley had been connected with the Alaska Juneau for many years, and in 1910 ReQua and I joined Brad. ley in driving the new adit and other work, for which We received a block of shares out of the treas ury of the company. Subsequently we. together with Mir Crocker, pur- chased the WernherBei; interests in the Juneau property, so that we ob- tained control.
 MT Bradley and made a joint report. estimating so to 100 million tons of ore to be mined and milled Gi~an sufficient money to develop anu equip the property We estimated a profit of $1,4OO.OOO per annum as reasonably assured. On the report We sold 100000 shares of the treas ury stock, netting the company SS per share, a large block being taken by E. x. Baruch and associates"
 MT. Mackenzie, I am going to ask you question that may be difficult tO answer. To what extent do you think these enormous bodies of low grade gold ore can be sampled?"
 My personal opinion is that the usual methods of sampling are of no use in such ore bodies, You have to carry out the test on a milling scale, that is, crush throusands oI tons and take samples right across the vein, quite similar to a moil cut, and. in addition you have to take 1t at different levels on the ore body. We milled 5O.OOO tons from across the ore body lying north of the SIl, yer Bow fault. and We based our IcaIculations on the value of the ore north and west of Silver Bow on that mill run. On the southeast side of the Silver Bow fault, adjoining the Alaska Gastineau Company prop erty, we based our calculations on about 4SO,OOO tons of ore that had been mined and milled during the life of the Alaska Juneau prior to and after our acquiring control"
 Can you find the number of rais. 1 ins in the cake without eating all of the cake'"
 l "NO Absolutely no. Therefore