Mechanics' Magazine, المجلد 46

الغلاف الأمامي
Knight & Lacey, 1847
 

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الصفحة 212 - Hulls : for a machine for carrying ships and vessels out of or into any harbour and river against wind and tide, or in a calm.
الصفحة 70 - But the truth is, that the temperature of 32° of Fahrenheit, that at which water freezes, is only the commencement of an operation that is almost infinite; for after its congelation, water is as competent to continue to receive cold as it was when it was fluid. The application of cold to a block of ice does not...
الصفحة 525 - ... that the patentee, if an alien at the time the patent was granted, had failed and neglected for the space of eighteen months from the date of the patent, to put and continue on sale to the public, on reasonable terms, the invention or discovery for which the patent issued ; in either of which cases judgment shall be rendered for the defendant, with costs.
الصفحة 192 - Europe," &c. With Two Illustrations engraved on Steel. Square fcp. 8vo. 3s. cioth. CRESY.-AN ENCYCLOPEDIA OF CIVIL ENGINEERING, Historical, Theoretical, and Practical. By EDWARD CRESY, FSACE In One very large Volume, illustrated by upwards of Three Thousand Engravings on Wood, explanatory of the Principles, Machinery, and Constructions which come under the Direction of the Civil Engineer. 8vo. j£3. 13s. 6d. cloth. THE CRICKET-FIELD; OR, THE SCIENCE AND HISTORY of the GAME. Illustrated with Diagrams,...
الصفحة 569 - The High-Pressure Steam Engine. THE HIGH-PRESSURE STEAM ENGINE ; an Exposition of its Comparative Merits, and an Essay towards an Improved System of Construction, adapted especially to secure Safety and Economy. By Dr. ERNST ALBAN, Practical Machine Maker, Plau, Mecklenberg. Translated from the German, with Notes, by Dr. POLE, FRS, M.
الصفحة 570 - I mentioned to you a method of still doubling the effect of the steam, and that tolerably easy, by using the power of steam rushing into a vacuum, at present lost. This would do little more than double the effect, but it would too much enlarge the vessels to use it all : it is peculiarly applicable to...
الصفحة 21 - COMET, between Glasgow, Greenock, and Helensburgh, for passengers only. " The Subscriber having, at much expense, fitted up a handsome Vessel to ply upon the River Clyde, between Glasgow and Greenock, — to sail by the power of Wind, Air, and Steam, — he intends that the Vessel shall leave the Broomielaw on Tuesdays, Thursdays, and Saturdays, about mid-day, or at such hour thereafter as may answer from the state of the tide, and to leave Grcenock on Mondays, Wednesdays, and Fridays, in the morning,...
الصفحة 449 - The temperate zone being subjeot both to real and apparent winds, must have very fluctuating barometers, and the same holds true to some distance within the arctic circle, explaining Dr. Halley's assertion, that the more northerly places have greater alterations of the barometer than the more southerly. At Barbadoes, the wind is almost always ENE, and at St. Helena ESE, and the barometer in those places has scarcely any variations, a fact which supports the doctrine I have lain down. The above is...
الصفحة 7 - tis plain, by his words, he knew not how to go about it. Now is not this very fine ? Mathematicians, that find out, settle, and do all the business, must content themselves with being nothing but dry calculators and drudges ; and another, that does nothing but pretend and grasp at all things, must carry away all the invention, as well of those that were to follow him, as of those that went before.
الصفحة 112 - To avoid this difficulty, attempts have been made to put the indicator within the boiler by covering it with glass, but with as little success, for the action of high temperatures, it is known, renders the glass opaque. " My invention, it is believed, will avoid all these difficulties ; and it consists simply in attaching a magnet to the axis of motion of a wheel or lever, to which the float is suspended or attached, to communicate motion, by attraction and repulsion, to an index needle turning on...

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