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The "Cranston" Rock Drill is driving levels 200 linear feet per month in hard quartz rock.
"Eberhardt" Tunnel now driven in over 3,842 linear feet with these Drills and Compressors.
It can be seen in Daily Practical Operation drilling 60 feet of Blast Holes per day in Limestone Rock at one-fifth the cost of Hand Labour.
For other particulars and prices, apply to --
J.G. Cranston,
22 Grey Street,
Newcastle-on-Tyne.
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