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" ... volume of water required to pass a boat up or down is termed the prism of lift. The calculation, therefore, for the quantity of water requisite for the service of the navigation, will be simply that of the number of prisms of lift... "
Mechanics, hydrostatics, pneumatics, optics - Page 167
by Ireland commissioners of nat. educ - 1861
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Philosophical Transactions of the Royal Society of London: From ..., Volume 11

Royal Society (Great Britain) - 1809 - 778 pages
...on the wheel ; " the effect of such a wheel will be equal to the effect of an undershot, whose head is equal to the difference of level between the surface of the water in the reservoir and the point where it strikes the wheel, added to that of an overshot, whose...
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The Miscellaneous Papers of John Smeaton, Civil Engineer, &c. F.R.S ...

John Smeaton - 1814 - 276 pages
...gravity upon the wheel; the effect of such awheel will be equal to the effett of an undershot, whose head is equal to the difference of level between the surface of the water in the reservoir and [the point where it strikes the wheel, added to that of an overshot, whose...
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Lectures on Select Subjects in Mechanics, Hydrostatics, Hydraulics ..., Volume 2

James Ferguson - 1823 - 444 pages
...so as to stop the wheel. According to Mr. Smeaton, " the effect of a breast-wheel is to the effect of an undershot wheel, whose head of water is equal...to the difference of level between the surface of water in the reservoir, and the part where it strikes the wheel, added to that of an overshot whose...
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Natural Philosophy: With an Explanation of Scientific Terms, and ..., Volume 1

1829 - 500 pages
...well constructed and closely built in, its effect, according to Mr. Smeaton, should be the. same as an under-shot wheel, whose head of water is equal...of level between the surface of the stream and the point where it strikes the wheel, added to the effect of an over-shot wheel, whose height is equal...
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Tracts on Hydraulics

Thomas Tredgold - 1836 - 288 pages
...upon the wheel; the effect of such a wheel will be equal to the effect of an undershot, whose head is equal to the difference of level between the surface of the water in the reservoir and the point where it strikes the wheel, added to that of an overshot, whose...
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The Industrial Resources of Ireland

Robert Kane - 1844 - 438 pages
...the words of Barlow : " The effect of the breast wheel is equal to that of an undershot whose head is equal to the difference of level between the surface of the reservoir and the point at which it strikes the wheels, added to that of an overshot whose height is...
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Encyclopædia metropolitana; or, Universal dictionary of knowledge ..., Volume 3

Encyclopaedia - 1845 - 902 pages
...on the wheel, the t/rct /if such wheel will be equal to the effect of an undershot wheel, whose head is equal to the difference of level between the surface of the water in the reservoir, and the point inhere it strikes the wheel ; added to that of an overshot v/icel,...
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An Elementary Course of Civil Engineering: For the Use of Cadets of the ...

Dennis Hart Mahan - 1846 - 380 pages
...or down, a quantity of water must be drawn from the upper level to fill the lock to a height which is equal to the difference of level between the surface of the water in the two ; this height is termed the lift of the lock, and the volume of water required to...
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An Elementary Course of Civil Engineering: For the Use of Cadets of the ...

Dennis Hart Mahan - 1846 - 378 pages
...or down, a quantity of water must be drawn from the upper level to fill the lock to a height which is equal to the difference of level between the surface of the water in the two ; this height is termed the lift of the lock, and the volume of water required to...
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The principles and practice of hydraulic engineering

John Dwyer (Lithographer.) - 1847 - 172 pages
...and quantity of water expended, that is to their product. BREAST WHEELS, He found their effect to be that of an undershot wheel whose head of water is...the difference of level between the surface of the water in the reservoir, and the part where it strikes the wheel added to that of an overshot wheel,...
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