26 Examination of Mines. 
and sampled, and the cubical contents of each triangu- 
lar solid computed and recorded. Where only one side 
of the unblocked ore is shown no estimate of ore in sight 
of that part of the mine can be made. Figure 13 repre- 
MW 
FIG 13. 
Longitudinal Section Illustrating Method of Sampling and 
Estimating Ore in Sight. 
sents a longitudinal, and Figure 14 a cross section of a 
partly developed mine. In Fig. 13, abc is the surface 
outcrop of the vein, b/ the incline shaft sunk on the dip 
| 
