A Letter to M. Ricardo, Esq: In Reply to His Letter to Dr. Yates, on the Proposed Method of Pneumatic Transmission, Or Conveyance by Atmospheric PressureCreasy and Baker; and sold by R. Loder; also at Messrs. Baldwin and Company's ... London, 1827 - 118 من الصفحات |
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admit advert air pumps apparatus application ascertain atmospheric pressure attempt barometer Brighton and Shoreham Brighton beach Brindsley bushel of coals calculations canal circumstance coach consequence conveyance conveyed Court of Chancery cylinder deem degree of exhaustion diameter drawn effect equal examine expense experience feet friction Genoa give greater horses Ice Boat impediment impossible inch of mercury increased investigation JOHN VALLANCE load locomotive engines machinery Medhurst method of pneumatic miles an hour motion move the carriage necessary to move NORTH-STREET notwithstanding object observe opinion owing Palmer pamphlet persons pipe pistons pneumatic transmission pose pounds per mile power necessary power required practical illustration principle proportion propose proposition prove public meeting rail road railway rarefaction ratus reference render reply scale shew shillings Shoreham Harbour six miles stationary engines steam engine suppose thing tion tons treatise tube tunnel turnpike roads two-hundredth vacuum Vallance valves vehicle velocity weight wheels
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الصفحة 2 - And what of this new book the whole world makes such a rout about ?' ' Oh ! 'tis out of all plumb, my lord, — quite an irregular -thing ! Not "one of the angles at the four corners was a right angle. I had my rule and compasses, my lord, in my pocket.
الصفحة 92 - Arkwright; a man to whose genius this country is indebted for very much of its commercial prosperity ; to whose improvements in the machinery for spinning cotton, we are indebted for being enabled to keep the cotton trade chiefly confined to ourselves. What, I say, was the great Arkwright? A barber. Yet...
الصفحة 53 - It is far from my wish to promulgate to the world that the ridiculous expectations, or rather professions, of the enthusiastic speculist will be realised, and that we shall see engines travelling at the rate of twelve, sixteen, eighteen, or twenty miles an hour. Nothing could do more harm towards their general adoption and improvement than the promulgation of such nonsense.
الصفحة 97 - ... navigation, but Brindley, furnished with ample resources, persevered, and conquered all the embarrassments, occasioned by the nature of the undertaking, and by the passions and prejudices of individuals. Having completed the canal as far as Barton, where the river Irwell is navigable for large vessels, he proposed to carry it over that river by an aqueduct thirty-nine feet above the surface of the water. This was considered as a chimerical and extravagant project; and an eminent engineer said,...
الصفحة 2 - Grant me patience, just Heaven! Of all the cants which are canted in this canting world — though the cant of hypocrites may be the worst — the cant of criticism is the most tormenting!
الصفحة 22 - Her properties are wonderful, and her motion is fearfully rapid. She can not only sail before the wind, but is actually capable of beating to windward. It requires an experienced hand to manage her, particularly in tacking, as her extreme velocity renders the least motion of the rudder of the utmost consequence. A friend of mine, a lieutenant in the navy, assured me, that he himself last year had gone a distance of...
الصفحة 96 - At the period of the construction of the first steam engine upon his principles at Soho, the intelligent and judicious Smeaton, who had been invited to satisfy himself of the superior performance of the engine by his own experiments upon it, and had been convinced of its great superiority over Newcomen's, doubted the practicability of getting the different parts executed with the requisite precision ; and augured, from the extreme difficulty of attaining this desideratum, that this powerful machine,...
الصفحة 2 - tis out of all plumb, my lord, quite an irregular thing — not one of the angles at the four corners was a right angle — I had my rule and compasses, &c., my lord, in my pocket.
الصفحة 22 - ... remaining one to the bottom of the rudder, which supports the stern of the vessel. Her mast and sail are similar to those of a common boat. Being placed on the ice when the Lake is sufficiently frozen over, she is brought into play. Her properties are wonderful, and her motion is fearfully rapid. She can not only sail before the wind, but is actually capable of beating to windward. It requires an experienced hand to manage her, particularly in tacking, as her extreme velocity renders the least...
الصفحة 22 - ... distance of twenty-three miles in an hour ; and he knew an instance of an ice-boat having crossed from York to Fort Niagara (a distance of forty miles) in little more than three quarters of an hour. This will be readily believed, when we reflect on the velocity which such a vessel must acquire when driven on skates before a gale of wind. These boats are necessarily peculiar to the lakes of Canada.