Minutes of Proceedings of the Institution of Civil Engineers, Volum 66The Institution, 1881 |
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Altres edicions - Mostra-ho tot
Minutes of Proceedings of the Institution of Civil Engineers, Volum 51 Institution of Civil Engineers (Great Britain) Visualització completa - 1878 |
Frases i termes més freqüents
amount apparatus Author average boat bogie boiler bottom bridge carbonic acid cent centimetre channel circular saws coal colza oil condensing construction consumption cost cubic feet cubic metres cutters cylinder Davy lamp defective depth diagrams discharge district efficiency electro-magnet embankment engine experiments Fahrenheit feet 6 inches firedamp fittings flour flow gallons heat inches in diameter increased indicated HP inspection Inst iron kilogrammes length machine material maximum meter miles mill millimetres mineral oil minute Mueseler lamp naphtha Night-rate obtained ordinary paraffin paraffin oil piston Plate pressure produced propeller pumps quantity railway reduced repairs reservoirs resistance retorts revolutions revolutions per minute river rollers scour screw service pipes shaft silt slip slope speed spindle square centimetre square feet square foot square inch steam steel stop-cocks surface temperature thickness timber tons torpedo-boats tubes tunnel valve velocity ventilator vertical vessel waste weight
Passatges populars
Pàgina 192 - It would certainly be esteemed one of the greatest discoveries of the age if any one could succeed in condensing coal gas into a white, dry, solid, odourless substance, portable, and capable of being placed upon a candlestick, or burned in a lamp.
Pàgina 20 - ... surface has considerably increased, and the conditions approximate to those of an ordinary river. The bottom layers of the water then spring suddenly into motion, the surface velocity diminishes steadily as the tidal waters disappear, until it assumes the normal rate of the low-water flow. During this period a scour of the bottom is of course going on ; but, as this velocity is not much higher than in the subsequent period of low-water flow, the rate of scour...
Pàgina 451 - In addition to these amounts paid to the contractors there is the cost of providing and maintaining tools, and the charge for canals, &c.; these items, with superintendence, add from 20 to 25 per cent, to the cost The total cost per inch depth of snow is £274. The tramway companies have to bear their share of the cost, and pay for clearing a width of 9 feet 10 inches for single, and 19 feet 8 inches for double lines.
Pàgina 20 - ... those of an ordinary river. The bottom layers of the water then spring suddenly into motion, the surface velocity diminishes steadily as the tidal waters disappear, until it assumes the normal rate of the low-water flow. During this period a scour of the bottom is of course going on ; but, as this velocity is not much higher than in the subsequent period of low-water flow, the rate of scour will not be much greater ; and the actual scour will be insufficient to compensate for the amount of deposit...
Pàgina 399 - ... fairly uniform reaches the velocity at any given point is extremely variable from instant to instant, and the stream lines interlace freely in all directions.
Pàgina 93 - Author on a model propeller, the performance of which was carefully noted, both when it was totally immersed and when it was working under such a state of immersion that it just broke the surface. In the first case, the useful effect was equal to about seven-tenths of the power expended, and the action was perfectly steady and easily recorded. In the second case, however, the condition of working varied so much that it was only with difficulty that the efficiency could be ascertained, and no precise...
Pàgina 118 - ... foreign power ? He was sure that the House entertained no such fears ; on the contrary, it was well known that the Society of Friends exhibited in their conduct a pattern of everything that was virtuous and amiable. In saying so, he meant them no flattery — he only did them the justice they deserved ; and he was glad to have an opportunity of bearing his testimony to the generous manner in which they devoted their time, their money, and their labour, to the furtherance of every humane and charitable...
Pàgina 251 - Now, in the first of these equations the second member represents the resistance of the wire of the helix, and the first member is the total resistance of the external circuit, expressed in units of the same order as those used in the evaluation of the length of the helix wire. But this total resistance is taken in inverse sense, because that which is under consideration is really represented by...
Pàgina 86 - AT the meeting on April 26 of the Institution of Civil Engineers, Mr. Walter R. Browne, MA, M.Inst. CE, read a paper on "The Relative Value of Tidal and Upland Waters in maintaining Rivers, Estuaries, and Harbours.
Pàgina 369 - ... the divisor, the speed of the propeller, expressed, not by its revolutions nakedly, but by its revolutions x its pitch, that is to say, the virtual travel of the force delivered by the propeller. The result thus obtained from the indicated horse-power I have termed "indicated thrust;" it is in fact the thrust which the propeller would be exerting if the force of the steam were employed wholly in creating thrust, instead of partly in overcoming friction, driving the air pump, and overcoming other...