Water Supply: The Present Practice of Sinking and Boring Wells. With Geological Considerations and Examples of Wells ExecutedE. & F.N. Spon, 1885 - 271 sider |
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attached beds Blue Clay bore-hole boring head boring rod boring tool bottom Brewery brick brickwork broken bucket cast-iron centre Chalk chisel clamp cloth Crown 8vo cubic cylinder débris depth Ditto Ditto drill driven edition Engineers excavation Fcap feet deep feet from surface feet O.D. flints gallons gallons a day gallons a minute grapnel gravel Green greensand Grey ground hard hole illustrations inches inches diameter inches in diameter Inst iron joint Keuper length limestone London clay lower Lower Tertiary machinery Marl means mottled clays Northampton sands oolitic outcrop Oxford clay passed Pebbles pipe piston plates pump quantity rainfall READING BEDS RED SAND red sandstone rock rope screwed shaft shell shown in Fig sinking steam steining stone strata stratum stroke sunk supply tamping thickness tion Treatise trepan tubbing tube upper Upper Greensand valve vertical water-bearing strata Waterworks weight windlass wrought-iron yield