W. T. Holt The drill rod may be extended to any desirable length by gas, however produced, will yield greater results in heat than and John North, June 22, 1869. simply adding fresh pieces of pipe. Common gas pipe is found can be obtained from any crude mineral fuel; while the gas During the past… … anthracite mines. This seems like ding purposes. It is also extensively " carrying coals to Newcastle," but is used for railroad grading, surface HEAVY PROSPECTING AND WELL-BORING MACHINE nevertheless a fact; while for the pro- mining, well-boring, etc., where it of illuminating gas, a rich…
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