Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 464
till are making valuable improvements in the line of efficiency and economy. Water, thatformerly cost 50 cts. per day for a miners inch, can now be secured at rates ranging from 2 to 10cts. per inch. The saving appliances now in use have increased the yield of gold per inch to $1 or even $L50.In… … from the use of compressed air, etc., to aid in the driving of drifts, tunnels, etc., by means of powerdrills of various kinds. It is claimed that an 8-ft. wheel under a 200-ft. head, using 100 miners inchesof water, will furnish about 50 horse-power at 175 revolutions. A is the wheel, B the…
Mechanical engineering -- Dictionaries
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
