Water Supply: The Present Practice of Sinking and Boring Wells, with Geological Considerations and Examples of Wells ExecutedSpon, 1875 - 217 pages |
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Page 45
... strength produce effects varying with their weight , that is , a double charge will move a double mass . And as homogeneous masses vary as the cube of any similar line within them , the general rule is established that charges of powder ...
... strength produce effects varying with their weight , that is , a double charge will move a double mass . And as homogeneous masses vary as the cube of any similar line within them , the general rule is established that charges of powder ...
Page 48
... strength of the workman is not fully em- ployed . The usual weight is from 5 to 7 lb. As the labour of boring a shot - hole in a given kind of rock is dependent on the diameter , it is obviously desirable to make the hole as small as ...
... strength of the workman is not fully em- ployed . The usual weight is from 5 to 7 lb. As the labour of boring a shot - hole in a given kind of rock is dependent on the diameter , it is obviously desirable to make the hole as small as ...
Page 59
... strength of the steining . A ring or two of brick- work in cement is often introduced at intervals , varying from 5 feet to 12 feet apart , to strengthen the shaft , and facilitate the construction of the well . Sectional Plan Fig . 46 ...
... strength of the steining . A ring or two of brick- work in cement is often introduced at intervals , varying from 5 feet to 12 feet apart , to strengthen the shaft , and facilitate the construction of the well . Sectional Plan Fig . 46 ...
Page 65
... strength according to the depth of the hole Fig . 61 . 10 ' : Fig . 62 . for which they are required ; they are generally 1 inch square in section at one end is a male and at the other end a female screw for the purpose of connecting ...
... strength according to the depth of the hole Fig . 61 . 10 ' : Fig . 62 . for which they are required ; they are generally 1 inch square in section at one end is a male and at the other end a female screw for the purpose of connecting ...
Page 74
... strength of the blow delivered . Cast - iron tubing may be driven hard with a monkey . To withdraw broken or defective tubing Fig . 86 . quickly , two hooks attached to ropes are lowered down. 74 WELL BORING . Dinner Waggon (Medieval)
... strength of the blow delivered . Cast - iron tubing may be driven hard with a monkey . To withdraw broken or defective tubing Fig . 86 . quickly , two hooks attached to ropes are lowered down. 74 WELL BORING . Dinner Waggon (Medieval)
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Autres éditions - Tout afficher
Water Supply: The Present Practice of Sinking and Boring Wells. With ... Ernest Spon Affichage du livre entier - 1885 |
Water Supply: The Present Practice of Sinking and Boring Wells. With ... Ernest Spon Affichage du livre entier - 1885 |
Water Supply: The Present Practice of Sinking and Boring Wells, with ... Ernest Spon Affichage du livre entier - 1875 |
Expressions et termes fréquents
Banister Fletcher beds Blue Clay Boilers bore-hole boring rod boring tool boring-head bottom Brewery brick brickwork bucket Butte-aux-Cailles cast-iron chalk chisel Civil Engineers cloth CONTENTS Construction crown 8vo cuts depth Ditto Edmund Sharpe excavation feet deep feet O.D. flints foot Formulæ gallons a day gallons a minute grapnel gravel greensand Grey Hedgerley hole Hydraulic illustrated inches diameter Isometric Projection joint Keuper length lever London clay lower Lower Tertiary Machinery Marl means Mechanical Memoranda mottled clays numerous OOLITE outcrop passed Passy Pebbles pipe piston plates Pocket-Book post 8vo pump quantity Railway rainfall READING BEDS RED SAND red sandstone River rock rope royal 8vo Screw Propeller screwed second edition sewed shaft shell shown in Fig sinking Slide Steam steining stone strata stratum stroke sunk surface Surface Condensers Tables thickness tion trepan tubbing tube upper valve vertical water-bearing strata Waterworks weight wood engravings wrought-iron yield
Fréquemment cités
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