498 ANNALS NEW YORK ACADEMY OF SCIENCES 



Na as chlorides, with a current density of 10 to 20 amps, per sq. ft. and a 

 temperature of 50° C, the E. M. F. for the first solution was 0.8 to 0.95 

 volts, for the second 0.5 to 0.85 volts, for the third 0.4 to 0.5 volts. 



The paper concluded with a discussion of the costs of electrolytic refining 

 of iron. 



Dr. Campbell, in the course of his paper, showed that the structure of 

 certain magnetic lead ores from the Frisco Mine, Idaho, was a fine-grained 

 complex containing magnetite, quartz, calcite and other gangue, blende 

 and galena, which were deposited in about that order. Zinc-lead middlings 

 from the jigs were concentrated by Dings separators into zinc-rich which 

 passed through and lead-rich which was taken out by the magnets. 



The structure of a zinc ore from the Graphic Mine, Kelly, N. M., at 

 ground-water level, was shown to be mainly rosettes and compact masses 

 of specular hematite with zinc blende in the interstitial spaces. Some 

 pyrite and chalcopyrite occurred and the order of deposition was seen to be 

 pyrite, hematite, chalcopyrite, blende and a little gangue. 



The unsuccessful attempts to concentrate nickel magnetically in nickeli- 

 ferous pyrrhotites was shown to be in part due to the fine condition of the 

 pentlandite. Slides illustrating the structure of ores from Sudbury, St. 

 Stephens, N. B., Gap Mine, Pa., Sohland, Germany, and Scandinavian 

 localities were shown. 



Dr. Campbell, in his second paper, said in abstract: The visit was made 

 with the Canadian Mining Institute during the summer. The collieries 

 of the Dominion Coal Company at Glace Bay and of the Nova Scotia Steel 

 Company at Sydney Mines were shown. At the Dominion Iron and Steel 

 Company the various piers, with mechanical unloaders for ore from New- 

 foundland, the loading of steel rails, etc., were seen. Four blast-furnaces, 

 ore-beds for winter stock, blowing engines, etc., two Bessemer converters, 

 ten open-hearth furnaces, rail mill, rod mill, coke ovens and coal washery. 

 The Nova Scotia Steel and Coal Company has coal and ore piers at North 

 Sydney, with two steam Wellman Seaver Morgan ore unloading cranes. 

 Wabana ore from Bell Is., N. F., averages 55 % Fe. One blast-furnace, 

 200 tons a day. Three 40-ton Basic open hearth furnaces and one rolling 

 furnace of 180 tons used as mixer. Ingots are sent to the rolling mills at 

 New Glasgow. The coke ovens and coal washer were also visited. 



The further business of the evening consisted of the nomination of 

 Sectional officers for 1909. Professor D. W. Hering was duly nominated 

 to the Council for Vice-President and Chairman. Professor W. Campbell 

 was elected Secretary. 



The Section then adjourned. 



William Campbell, 



Secretary. 



