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Photographs. 



Page 



Rain erosion and striated surface of greywacke, Copper Cliff. . 12 



Interior plain of nickel basin from acid edge, near Azilda.... 14 



Quartzite showing cross-bedding, Ramsay Lake 16 



Structure in gabbro, Sudbury 17 



Structure in gabbro, Sudbury 18 



Onaping Falls over vitrophyre tuff 19 



Anticline of Chelmsford sandstone, near Chelmsford 20 



Ruined anticline, Larchwood 21 



Crush conglomerate in granitoid gneiss, Creighton 23 



Face of ore, open pit, Creighton, early stage 24 



Creighton mine, recent condition of open pit 27 



Smelter, Copper Cliff 29 



Smelter, Copper Cliff 31 



Pouring slag, Copper Cliff 33 



Banded iron formation, Sellwood 35 



Contorted structures in iron range, Sellwood 37 



Moose Mountain iron mine 39 



Cobalt station, June, 1905 53 



Torsion cracks in Keewatin greenstone, Cobalt 63 



Temiskaming series, tilted into vertical position, between 



Haileybury and New Liskeard 67 



Conglomerate of Cobalt series, containing a conglomerate 



boulder from the Temiskaming series 7° 



The Little Silver Vein, Nipissing mine 7 2 



Coarse boulder conglomerate, Cobalt series, Tretheway mine, 



Cobalt 76 



Quartz-diabase, Cobalt 84 



A typical silver-cobalt vein, outcrop on Coniagas, Cobalt 91 



Polished surface of silver ore . . ^ 9 2 



An underground view in La Rose mine 94 



General flow sheet, Cobalt concentrators 101 



Street in South Porcupine, March, 1912 in 



Stratified clay at Sandy Falls, Porcupine area 114 



Ellipsoidal, Keewatin greenstone, Night Hawk lake 117 



Narrow quartz veins in Keewatin carbonate schist at Dome 



property, Nov., 1910 119 



Narrow quartz veins (auriferous) cutting conglomerate at 



Three Nations Mining Co.'s property, Sept., 191 1 122 



Contact of quartz and schist, Hollinger mine 125 



Quartz masses in contact with schistose conglomerate, Dome 



mine, Nov., 1910 127 



Part of " Golden Stairway " vein, Dome mine 129 



Photomicrograph from Swastika mine 131 



Streaked ore from Jupiter mine, Porcupine 134 



Brecciated structure of quartz from Mclntyre main vein 135 



Quartz vein on 100-foot level, McEnaney mine 137 



Otto lake from Swastika mine 146 



