CRANE. | Economy of Mining Operations. 345 
cents; a 5x7 shaft, 1 foot, for $1.26. Two-by-sixes cost the 
same as two-by-fours, as the price per thousand is the same. 
Four-by-sixes, at $17.50 per thousand, cost in a 4x5 shaft, for 
1 foot of cribbing, 74 cents; in a 5x7 shaft, 1 foot, 95 cents. 
Six-by-sixes, costing $18 per thousand, cost 57 cents in crib- 
bing a 4x5 shaft 1 foot; and a 5x7 shaft, 72 cents per foot. 
The range of prices is, then, as follows: 
Kind. Sizer (= COREE ERO a eCoet noe! 
VOUT Gabi eraaryy cee ne iste eh a, 2in. $0 66 $0 84 
SAWCURLHIMD Cierny cut dem den nM eigen ices 2x4 99 1 26 
SAW CGatliMD Cie hie One. ra nese ihe We 2x6 99 1 26 
Sawedaetiimb eres Mickie aioe ors ce aerate. 4x6 74. 95 
SAWCCE CMD EAM ae ee aso les Sie ee heal aces 6x6 57 72 
If the minimum price for rough round timber (4 
cent) is taken, the above figures will be reduced 
OLDS OY REO OC ee Ae ee Oi ae an Ai ea Re A ee ag 33 42 
These figures are for open cribbing. If closed cribbing is 
desired, the above figures will have to be nearly doubled, as 
about twice the timber is placed, and the extra cost of placing 
will nearly double the cost of open cribbing. 
In placing the timbers, constituting the cribbing, three men 
are employed—one on top and two below. The wages of 
these men range from $1.25 to $1.75 per day; taking $1.50 
as an average, the total cost of labor is $4.50 perday. Sum- 
ming up the cost of shafting, cribbing, etc., we have, for an 
advance of 1 foot, considering that 20 feet of cribbing can be 
placed per day: 
4x5 Exe 
shaft. shaft. 
COSTO Tee NCA ALIN OI OO Ea aie verte a cisssiee rls, sees aibaeias grou sucs 608. ares $6 00 $8 00 
Costioicribbingwloo tem anime ais Rot Mee ee clsie bs wattle 57 72 
CostrotmavortOrplacinomlelootmen as hin are ere aes ee 22 25 
NOUN Es sh bid Halen ue Eee BOG HA Gee techs ME RRR Re ea een ee $6 79 $8 80 
The timbering of drifts is more complicated, and, there- 
fore, more expensive. The large, round timber (in the 
rough) costs about 5 cents per foot, while the lagging and 
spiles cost about 5 cents per 10-foot length. 
The sets are placed on an average of 4 feet apart (ranging 
from 1 to7 feet). Hach set contains about 40 feet of timber, 
