Hydraulic Tables: To Aid the Calculation of Water and Mill Power, Water Supply, and Drainage of TownsWaterlow & Sons, 1852 - 92 من الصفحات |
عبارات ومصطلحات مألوفة
acres afternoon tide amount average Beccles bore Bristol Channel Burgh column cotidal lines Cube Roots cubic feet Cwts datum depth of water diameter ditches drainage area Eau Brink effect engine English Channel fall feet per minute flood fluid Framilode give given Glencorse H. M. Ft Half-tide Haw Bridge Height on Gauge high and low high water Hock Crib Holyhead inch of rain inches per mile Interval of Passage Irish Sea length Liverpool Lock London Bridge low water mean miles an hour Mins Mn's Moon's Decl Morecambe Bay Mythe Bridge NEAP TIDE nearly Nene Newburgh observations ordinary Perth pipes places Port Glasgow Putney Bridge Quay REMARKS Rennie reservoir rise river sectional area Severn shew sluice Spring and Neap spring tides square mile square root Stonebench stream summer surface tabular number tances Teddington Lock tidal wave tide-wave velocity weir width Yarmouth ΙΟ دو
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الصفحة liii - Russell rocks, and other reefs in the vicinity of that dangerous group ; and takes the direction of the coast again from Muck Island to Black Head, at the entrance of the Lough of Belfast, which it fills. The portion of the stream which sets up the Lough, splits again off Grey Point; one portion flowing up towards Garmoyle, while the other bends back along the shore of Bangor, Grimsport and Orlock, and blends with the general stream which has come on from the Maidens and Blackhead, and passes with...
الصفحة lii - ... and strong rippling all round the edge, by which the bank may generally be discovered. Beyond this point the streams unite and flow on towards Howth and Lambay, growing gradually weaker as they proceed, until they ultimately expend themselves in a large space of still water situated between the Isle of Man and Carlingford.
الصفحة xliv - ... sunrise ; but the amount of the difference of these extremes is variable, depending upon latitude, elevation, locality and geological formation of the country. If we compare the mean temperatures of places that differ considerably from each other in latitude, we shall find that the mean values are lower as we proceed north. If we compare the mean temperatures of places having the same latitude, we shall find that the mean value of those situated at the higher level will be less than those at...
الصفحة xlviii - ... 17. A tidal bore is formed when the water is so shallow at low water that the first waves of flood tide move with a velocity so much less than that due to the succeeding part of the tidal wave, as to be overtaken by the subsequent waves, or wherever the tide rises so rapidly, and the water on the shore or in the river is so shallow that the height of the first wave of the tide is greater than the depth of the fluid at that place. Hence in deep water vessels are safe from the waves of rivers,...
الصفحة xlvii - ... 7- The height of a wave may be indefinitely increased by propagation into a channel which becomes narrower in the form of a wedge, the increased height being nearly in the inverse ratio of the square root of the breadth. 8. If waves be propagated in a channel whose depth diminishes uniformly, the waves will break when their height above the surface of the level fluid becomes equal to the depth at the bottom below the surface. 9. The great waves of translation are reflected from surfaces at right...
الصفحة xlix - See Experiments (11) and (12). The following three experiments are instructive as having been made on channels in which the maximum depth was nearly the same in all; but in (15) the depth remained constant to the side which was vertical. In (16) the sides had a slope of nearly 20°, and in (17) a slope of nearly 40°, so as to diminish the depth towards the sides. Maximum depth.
الصفحة xxxvi - The degree of evaporation very much depends upon the difference between the quantity of vapor which the surrounding air is able to contain when saturated and the quantity which it actually contains. M. Humboldt found that in the torrid zone the quantity of...
الصفحة li - ... water at the same time ; that there are two spots in the channel, in one of which the stream runs with considerable velocity without the water either rising or falling, and in the other, that the water rises and falls from sixteen to twenty feet without having any visible horizontal motion of its surface ; and that during the first half of the flowing, and last half of the ebbing tide-wave, the stream in the south channel runs in a contrary direction to the wave, and goes up an ascent of about...
الصفحة lvi - Head encounters the ingoing stream of the offing tide somewhere about the Start Point, and both are turned down into the great Gulf of St. Malo, which seems to receive the accumulated waters of these opposite tides.
الصفحة l - Space described. Velocity. (15.) 5-6 feet Rectangular 486 feet 9-59 miles (16.) 5-5— Slope of 20° 2038— 8'83 — (17.) 5-5— Slope of 40° 1000— 7'84 — From these it is manifest that the depth of the channel, while it modifies the depth of the fluid, affects the velocity of the wave. It was not found that the breadth of the channel produced any similar effect. The results obtained from the experiments of 1834 and 1835 were considered by the Association of sufficient novelty and importance...