Transactions . Fig. 12.—Leyner Type of Drill Driving an Inclined Raise in the Calumet and Hecla Mine. 168 ROCK-DRILLING -; a Eh 3 X agO «o o KO oo o - & i« [n b i[tP 32a*H0lJ o J 4 o jrup sSnono »_ o 1 S -9 ~ -s lis ssog 1 IJiIS •?II o . 5Biq-pn 11 s-tBuo^ o qju nm >UB s ; jra dn Sumo suiipBin St !W!1S{ § ,ui-Sn|i!^em 3l(jpai 2 IF £nv oL_ X - iy^1 ^ OtIITJD «nj 2 c O t- -n nw aSn 13^ 1 ~i S is p»g !? 11 vl 85 ™i ?> [I!-1! »q )^ © qlijp sSubiio 3a IPP IB 3X1 nnsi i; q» St a !1 3l ** 1 1 II ?H!is| B*P| o© 0 * o O: | = ^ sSt. »qa © CM ;r jp si mnK ~L~ i- o fu^ II MP
Transactions . Fig. 12.—Leyner Type of Drill Driving an Inclined Raise in the Calumet and Hecla Mine. 168 ROCK-DRILLING -; a Eh 3 X agO «o o KO oo o - & i« [n b i[tP 32a*H0lJ o J 4 o jrup sSnono »_ o 1 S -9 ~ -s lis ssog 1 IJiIS •?II o . 5Biq-pn 11 s-tBuo^ o qju nm >UB s ; jra dn Sumo suiipBin St !W!1S{ § ,ui-Sn|i!^em 3l(jpai 2 IF £nv oL_ X - iy^1 ^ OtIITJD «nj 2 c O t- -n nw aSn 13^ 1 ~i S is p»g !? 11 vl 85 ™i ?> [I!-1! »q )^ © qlijp sSubiio 3a IPP IB 3X1 nnsi i; q» St a !1 3l ** 1 1 II ?H!is| B*P| o© 0 * o O: | = ^ sSt. »qa © CM ;r jp si mnK ~L~ i- o fu^ II MP j-SUTl 101 o 31 simp si UBT101* (IPT oSob iuJl 03+ c iO =1 ?? > pa, »M laiijoBiu ni aloq JMB^i. 1 -I 3 J-51 Bji q ,ul- sm jp aHI!J 1 1 I n ; p aSi T?T 0 >< Lt c3ub fr ? t ! (.una 3^ T PISJ 9 II! P >3 [« 10 -> - II a«tIC ^--~- 5 o .til! dub I«P )SuBtiof—L 1 imp ?3 I
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
