Minutes of Proceedings of the Institution of Civil Engineers, Volume 62Institution of Civil Engineers, 1880 |
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adopted amount apparatus Author average boiler briquettes bushel canal carbon cent centre clay coal cofferdam compression concrete considerable construction cost cubic mètres cubic yard cutting cylinder D. K. Clark depth diameter effect efficiency elastic limit electric embankment employed experiments feet flange girders Gothard tunnel Gramme Gramme machine harbour heat hour increase iron kiln kilogrammes lamps latter length light lime locks machine manufacture material miles Minutes of Proceedings motors moulds neat cement North Sea obtained ordinary pass pipe piston Plate Polder Portland cement pressure Proceedings Inst proportion pump quantity rail railway revolutions revolutions per minute rock Roman cement sand shaft shale side sieve sifted slip slope specific gravity square centimètre square inch steel stroke surface temperature tensile strength thick tons per square tunnel vertical vessel Vide Minutes weight weirs zinc Zuider Zee
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Pagina 78 - ... contained in it. The final result is derived from two operations. During calcination, the lime is rendered caustic by the evolution of carbonic acid, and this caustic lime then re-acts upon the siliceous clay converting it into a compound that is easily decomposed by acids. The excess of caustic lime, as well as the compound into which the siliceous clay has been converted, then re-act upon each other, when mortar is prepared from the ground burnt lime, in such a manner, that a solid stone-like...
Pagina 343 - The positive terminal of the voltmeter must be brought into contact with the positive terminal of the battery, and the negative terminal of the voltmeter with the negative of the battery.
Pagina 126 - Testing.—The cement is to be gauged with three times its weight of dry sand, which has passed through a sieve of 400, and been retained upon one of 900 meshes to the square inch. The cement and sand having been well mixed dry, about 10 per cent• of their weight of water is to be added, and briquettes formed in moulds of 1 inch sectional area at the weakest part.
Pagina 122 - It is as follows: make two cakes of neat cement, 2 or 3 inches in diameter, about -J- inch thick, with thin edges. Note the time in minutes that these cakes, when mixed with water to the consistency of a stiff plastic mortar, take to set hard enough to stand the wire test recommended by Gen.
Pagina 415 - ... which is the basis of pay, is ascertained by means of a number of stone posts, fixed in suitable open spaces, clear of shelter from buildings, and each capped with a flat horizontal slab of stone. As soon as it stops snowing, or two or three times during a storm of several hours, the depth of snow caught on the slabs is measured by the engineer in the presence of two of the contractors in his section. The number of men ordinarily engaged in snow clearing on a winter's day is not less than two...
Pagina 324 - ... will be 50 per cent, of that employed upon the first, and the number of revolutions of the armature of the second machine, corresponding to the maximum of work reclaimed, will be half the number made by the first.
Pagina 126 - Here, if desired, the words may be inserted " weighing not less than 112 Ibs. to the bushel." that the residue on a sieve of * meshes to the square inch shall not be more than t per cent. by weight. Should the residue be greater, a quantity of cement proportionate to such excess must be added. When brought upon the works it is to be put into a dry shed or store which the contractor to provide for the purpose, having a wooden floor and all necessary subdivisions.
Pagina 306 - ... are more or less dispersed in an isolated condition in the air or other gas, so that on ignition, instead of an explosion ensuing, the flame will be communicated gradually from one combustible particle to another, thereby effecting a gradual development of heat and a corresponding gradual expansion...
Pagina 129 - This consists of a glass flask having two bulbs, the lower somewhat exceeding the upper in capacity. The exact capacity of the lower bulb is of no importance. On the neck between the bulbs is a mark a; on the neck of the upper bulb is a similar mark b.
Pagina 295 - ... nature of my improvement, and the manner in which I carry the same into operation, what I claim therein as my invention, and desire to secure by letters patent, is the placing a series of circulating tubes on the front plate of the boiler, in such a manner as that they shall, at their lower ends, communicate with the water in the lower part of the boiler, and at their upper ends with the water in said boiler a little below the water line, whilst they are, along their whole length, exposed to...