iv

Figure 1.
2.
3.
4,

Plan of underground workings, Rocher De Boule mine, October 1, 1917,
Rocher Déboulé mountains, British Columbia...... Er ts a Hiae
Stope elevations projected on plane of vein No. 4, Rocher De Boule
mine, 1917, Rocher Déboulé mountains, British Columbia.......-
Vertical projection of upper and lower veins on Delta property, Rocher
Déboulé mountains, British Columbia...............-..+-+--- oe
Plan and elevation of east end workings, Delta property, Rocher Déboulé
mountains, british Columbian eee she ane = | eee ee
Plan and elevation of main workings on Silver Standard mine, 1917,
British Columbia sso eee Sy ee ana ae S 2