Railway Locomotives and Cars, Том 14

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Simmons-Boardman Publishing Corporation, 1842

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Стр. 335 - The Committee on Science and the Arts constituted by the Franklin Institute of the State of Pennsylvania, for the promotion of the Mechanic Arts, to whom was referred for examination a Solar Compass, invented by WM.
Стр. 31 - ... decomposed by age. At the end of three years, he directed his butler to ascertain the state of the wine, when, on attempting to open the cellar door, he could not effect it, in consequence of some powerful obstacle. The...
Стр. 334 - The Committee on Science and the Arts, constituted by the Franklin Institute of the State of Pennsylvania for the promotion of the Mechanic Arts, to whom was referred for examination, two reflecting telescopes, made by Mr.
Стр. 319 - ... the Neva, where the most violent gales are always those from the west, so that the mass of waters, on such occasions, is always forcibly impelled towards the city. The islands forming the Delta of the Neva," on which St. Petersburg stands, are extremely low and flat, and the highest point in the city is probably not more than twelve or fourteen feet above the average level of the sea. A rise of fifteen feet is, therefore, enough to place all St. Petersburg under water, and a rise of thirty feet...
Стр. 47 - Vernon," thus equipped, having on board nine hundred tons of cargo, and sixty tons of coal, drew seventeen feet of water. In the first trial the speed of the vessel, under steam alone, was five and threequarters nautical miles per hour, demonstrating how small a power is necessary for a moderate speed. She then started for Calcutta, and though the piston rod broke three times during the voyage, owing to a defect in one of the paddle shaft bearings, the passage was satisfactory. The details are given...
Стр. 50 - Table, showing the rates of velocity which would be attained by substituting engine power, with its consequent weight of one ton per horse power, for cargo, so as to preserve the draught of water the same in all cases. Mr. Seaward remarked, that his Table of power and velocities was corroborated by Mr. Cubitt's — the practical results verified both. The great difference between the
Стр. 345 - ... feet. The sides and bed were there lined with puddle, and protected by a facing of rubble wall. Thence, to the seventh lock, the channel was again formed by benching and embanking through a clay soil, where much caution was necessarily exercised in preventing slips at the foot of the embankment, which was subject to inundations from the Blackwater. The masonry was all constructed of limestone from an adjacent quarry. Two Appendices are subjoined to this Paper. The first of these gives in detail...
Стр. 47 - ... owing to a defect in one of the paddle shaft bearings, the passage was satisfactory. The details are given minutely, as are. also those of the homeward voyage, which was performed from Calcutta to London in eighty-eight days, to which must be added seven days for necessary delay at the Cape, making a total of ninety-five days, which is the shortest passage on record. Great credit is given to Captain Denny for the judgment with which he used the auxiliary steam power, and the course taken by him,...
Стр. 45 - ... occupied as an engine room. The weight of fuel is also in direct proportion to the size of the engines; so that taking for example, two vessels of two hundred and of four hundred horses power respectively — that of the higher power will have to carry nearly double the weight, both of fuel and of engines, and it is still questionable whether the increased force will propel the one ship more than one and a half miles per hour faster than the other.
Стр. 222 - Remnants of iron, it is said, have lately been found in these grooves. Finally, M. Arago has argued, that they not only possessed a knowledge of steam power which they employed in the cavern mysteries of their pagan freemasonry, (the oldest in the world, of which the pyramids were the lodges,) but that the modern steam engine is derived, through Solomon de Cain, the predecessor of Worcester, from the invention of Hero, the Egyptian engineer.

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