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adopted advantage amount appears Birmingham branch bridge calculated called carriages carried cent coal commenced committee communication completed consequence considerable considered construction contract cost course direction directors distance doubt Dublin effect engines estimate executed expected expense experiments fact favour feet four gage give given Government Grand greater half hour important inches increased interest Ireland iron Junction June Kilkenny laid land latter length less Liverpool load London Manchester means meeting Midland miles nearly North object observed obtained opened opinion passengers passing portion present progress proposed proprietors railroad rails railway received respect result river road shares side sound speed station steam surface taken timber tons town traffic travelling tunnel Western wheels whole Wood yards
Page 400 - But the floating bridge requires no such expensive appendages; the chains on which it works, when the wheels are in motion, becoming the most secure fastening when the engines are stopped. The chains also act as a pilot and crew, two persons only being required in a vessel of this kind, viz. an engine-man and one on the decks to attend to the drawbridges. Mr. Vignoles remarked, that the plan now proposed would obviate many difficulties which occurred in the case of rail-roads; there •were many...
Page 488 - Willis deduces the corollary, that if for a set of wheels of the same pitch a constant describing circle be taken and employed to trace those portions of the teeth which project beyond each pitch line by rolling on the exterior circumference, and those which lie within it by rolling on its interior circumference, then any two wheels of the set will work correctly together.
Page 251 - Premiums to communications of adequate merit on the following subjects : — 1. The Nature and Properties of Steam, especially with reference to the quantity of Water in a given bulk of Steam in free communication with water at different temperatures, as deduced from actual experiment.
Page 567 - The jumpers were 6 feet long, and 2£ inches in diameter; the blasts 5 feet deep, and at a distance of 4 feet from each other. The rate of boring varied from 2| to 5 feet per day's work for two men. A double-headed jumper was used, to render the hole completely circular for the reception of the canister, about 2| feet in length and 2 inches in diameter, and filled two-thirds with powder and the rest with sand. The small tube reaching to the surface of the water contained quick-match, with a piece...
Page 142 - AA through very bad strata, Mr. Brunei has fully tried and proved the great power of his excellent shield ; but the strata, rendered worse by the irruptions and the causes assigned by Mr. Brunei, are now too bad for even the shield to overcome. By the substitution of good artificial soil to work through, and keeping the...
Page 171 - On the Newcastle and Carlisle road, prior to the railway, the whole number of persons the public coaches were licensed to carry in a week, was 343, or, both ways, 686 ; now the average daily number of passengers by the railway, for the whole length — viz., 47i miles — is 228, or 1596 in the week.
Page 80 - come to the conclusion that the two great lines which would open the country in the most advantageous manner, confer the most extensive accommodation at the smallest outlay, and afford the greatest return on capital,
Page 485 - ... or in which the funds are inadequate to the execution of the work on a scale adapted to such locks. This Lift is 46 feet in height, and consists of two chambers, similar to those of a common lock, with a pier of masonry between them ; each chamber being of sufficient dimensions to admit of a wooden cradle, in which the boat to ascend or descend floats. The cradle being on a level with the pond of the canal, a water-tight gate at the end of the cradle and of the pond of the canal is raised up,...
Page 566 - If-inch to the depth of 21 feet. A constant supply of water is required during boring the hole. The hole being well dried, about one-third is filled with powder, say 15 Ibs.; a needle is introduced as far as possible without driving it; the hole is tamped with dry clay to the top, and then covered with a little wet clay, to prevent any of the loose particles falling in when the needle is withdrawn. A reed filled with powder, and split at the top, to prevent its falling to the bottom of the hole,...
Page 178 - Railways are assuredly, next to the invention of printing, the most powerful instrument of civilization that the ingenuity of man has ever devised. It is difficult, if not impossible, to foresee and define the results which they must, of necessity, at some period produce on the fate of nations.