American Railroad Journal, Band 15Simmons-Boardman Publishing Corporation, 1842 |
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advantages American Railroad Journal amount annum appears atmospheric railway average axles boiler bridge calculated canal carriages carried cars cast iron cause cents per mile charge coal construction corrosive sublimate cost curves cylinder distance dollars edge rail effect electro-magnetic Elsecar embankments Erie canal estimated expenditure expense experiments feet flat bar freight friction grades gradients greater heavy hot blast inches increased interest kyanizing Lachine canal laid less line of railway load locomotive locomotive engines locomotive power machinery ment miles in length mode nearly North Union Railway observed operation passengers passing pig iron pipe piston portion present pressure principle produced Professor proportion quantity receipts remarks repairs river road rocks Samuel F. B. Morse steam sufficient superstructure surface telegraph timber tion tons trade traffic trains transportation velocity Vignoles weight wheels whole wood wrought iron yard York
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Seite 362 - ... developments of science are able to furnish the means of certain success, and the devising a plan for carrying it into practical operation, are the grounds of a just claim to scientific reputation as well as to public patronage. About the same time with yourself, Professor Wheatstone of London, and Dr. Steinheil of Germany, proposed plans of the electro-magnetic telegraph; but these differ as much from yours as the nature of the common principle would well permit; and unless some essential improvements...
Seite 39 - ... hours, during which time from 17 to 20 loads are kyanized in each tank. It is desirable that the timber should remain stacked for two or three weeks after kyanizing, before it is used. It was found that about \ Ib.
Seite 15 - ... oxide of iron, and then the further action of the fuel (besides sustaining a high temperature) was to abstract the oxygen of the oxide, and so to reduce the iron to the metallic state, after which a still further portion of the carbon of the fuel combined with the iron, bringing it into the state of easily fusible or pig-iron. As carbon may be communicated to the iron in two ways, distinct in their nature, either by contact with solid carbon, as in the process of cementation, (that by which steel...
Seite 289 - ... the merit of the invention, and the foundation of the patent ; the operation consisting first, in opening the valve to admit the free admission of the external air, to press on the back of the piston, and produce motion ; and then in effectually closing down and sealing the valve again, so as to leave the pipe in a fit state to receive the travelling piston of the next train, and ready to be again exhausted of its air.
Seite 291 - ... of that produced on a horizontal plane at the previous velocity, the power being lost or absorbed in the inverse ratio in which it requires to be augmented, precisely at the moment when it is most important to obtain an increase. This subject has been ably treated in the Second Report of the Irish Railway Commissioners, (see notes D and E, pp. 104 to 110, which are understood to be from the pen of Professor Barlow.) It is there...
Seite 178 - Having saddled our horses, we pursued our journey in a north-east direction ; but we had scarcely proceeded six miles before we suddenly came upon an immense rent or chasm in the earth, far exceeding in depth the one we had so much difficulty in crossing the day before.
Seite 45 - ... of tar, but as the oil is very penetrating, previous exhaustion of the air had been found unnecessary, the hydrostatic power being sufficient. The mode of working the tanks was to charge them with timber, close them and fill them with the oil ; a hydrostatic pressure of from 100 Ibs. to ISO Ibs.
Seite 194 - A few years ago the immense quantity of soap-suds employed in the city of Rheims in preparing woollen stuffs was entirely lost. M. Houzeau Muiron conceived the idea of extracting from them the fatty matter, and of making an important application thereof. In fact, by submitting them to a regular purification, he has obtained a limpid oil, with which he succeeds in preparing the soaps in demand in commerce, while the residue of this purification serves for the advantageous production of a gas for lighting...
Seite 291 - ... expended during the transit of a given load, over a given distance, is the same, whatever the speed ; and at the same time a saving in the loss from leakage is effected also in proportion to speed. On a line worked by locomotive engines it has been clearly proved that an increase in the velocity of the train from 25 to 30 miles per hour, is attended with a loss of more than half the effective power of the engine. This disadvantage is also attended by another serious one when an engine has to...
Seite 40 - ... had become perfectly saturated. Captain Scoresby, in his account of the whale-fishery, remarks, that when a whale carries a boat down, it rarely rises again, most probably because the fish plunges to such a depth that the extreme pressure water-logs the boat : instances had been known of the specific gravity of the planking being doubled by being carried down. Mr. Newton remarked, that immersion of timber in close tanks had been practised by Mr. Langton many years since, for bending timber :...