The Mechanic's Magazine, Museum, Register, Journal and Gazette, Band 37Robertson, 1842 |
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Seite 5
... greater abundance and can pro- duce cheaper than any other nation on the face of the earth . The use of iron for ships is commonly supposed to be of very recent origin , but Mr. Grantham , the author of a work on the subject which has ...
... greater abundance and can pro- duce cheaper than any other nation on the face of the earth . The use of iron for ships is commonly supposed to be of very recent origin , but Mr. Grantham , the author of a work on the subject which has ...
Seite 12
... greater heat is produced in the immediate region of the furnace ; and hence the received notion , that enlarging the fur- nace increases the evaporation . This may be advisable under the old system , which depends almost entirely on the ...
... greater heat is produced in the immediate region of the furnace ; and hence the received notion , that enlarging the fur- nace increases the evaporation . This may be advisable under the old system , which depends almost entirely on the ...
Seite 13
... greater waste from the increased tempera- ture of the escaping gaseous products by the chimney . The more active the combustion , the greater will be the ratio of loss arising from the escaping and unemployed heat ; first , because the ...
... greater waste from the increased tempera- ture of the escaping gaseous products by the chimney . The more active the combustion , the greater will be the ratio of loss arising from the escaping and unemployed heat ; first , because the ...
Seite 25
... greater advantage , in cases of weights and measures ( where the scale was now most anomalous and absurd . ) Suppose the rental or value of 30.64 acres of land to be re- quired , and that the land cost 691. 3 Victo- rines , 4 cents an ...
... greater advantage , in cases of weights and measures ( where the scale was now most anomalous and absurd . ) Suppose the rental or value of 30.64 acres of land to be re- quired , and that the land cost 691. 3 Victo- rines , 4 cents an ...
Seite 42
... greater the weight supported ; there is this difference , however , between it and the discs , that in the latter the whole force of the blast is directed against the moveable disc , operating to its disad- vantage , so that it is only ...
... greater the weight supported ; there is this difference , however , between it and the discs , that in the latter the whole force of the blast is directed against the moveable disc , operating to its disad- vantage , so that it is only ...
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acid angle annuity anthracite apparatus applied Argand burner atmosphere axle Blackwall boiler bottom Bude Light carbonic acid carriages cause centre chimney chlorine cistern coal column combustion communication construction copper crank cylinder diameter distance ditto ditto effect engine equal experiments feet flues force friction fuel furnace Galignani give glass heat holes improvements inches invention iron J. C. Robertson J. R. HILL length lever light Liverpool locomotive London machine machinery manufacture matter means mechanical ment Messrs metal miles mode motion observed obtained paddle-wheels paper pass patent pipe piston plate present value pressure principle produced propeller pump purpose quantity rails railway readers resistance rope screw shaft ship side six months square steam steam-engine stroke Stuckey's supply surface tion tube valve velocity vessel weight wheel wire wire rope wood Ystalyfera
Beliebte Passagen
Seite 369 - 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.
Seite 588 - ... any new and original design for a bust, statue, or bas relief or composition in alto or basso relievo, or any new and original impression or ornament, or to be placed on any article of manufacture, the same being formed in marble or other material, or any new and useful pattern...
Seite 374 - An account of the waste or increase of the Land on any part of the coast of Great Britain, the nature of the Soil, the direction of the Tides, Currents, Rivers, Estuaries, &c., with the means adopted for retarding or preventing the waste of the land.
Seite 496 - When no unguent is interposed, the friction of any two surfaces (whether of quiescence or of motion) is directly proportional to the force with which they are pressed perpendicularly together ; so that for any two given surfaces of contact there is a constant ratio of the friction to the perpendicular pressure of the one surface upon the other.
Seite 466 - ... 2. On repeating this simple experiment, I find that it is necessary for the production of a good effect to use dissimilar metals ; for instance, a piece of gold or platina on a plate of copper or of silver will make a very decided image, whereas copper or silver on their respective plates...
Seite 341 - We are of opinion that if the result produced by such a combination is either a new article, or a better article, or a cheaper article to the public, than that produced before by the old method, that such combination is an invention or manufacture intended by the statute, and may well become the subject of a patent.
Seite 468 - I feel convinced that we have to do with some thermic influence, and that it will eventually be found that some purely calorific excitement produces a molecular change, or that a thermo-electric action is induced which effects some change in the polarities of the ultimate atoms of the solid.
Seite 347 - ... to the health. But as it approaches the metropolis, it becomes loaded with a quantity of filth, which renders it disgusting to the senses, and improper to be employed in the preparation of food.
Seite 588 - ... manufacture, not known or used by others before his, her, or their invention or production thereof, and prior to the time of his, her, or their application for a patent therefor, and who shall desire to obtain an exclusive property or right therein to make, use, (and sell) and vend the same, or copies of the same, to others, by them to be made, used, and sold, may make application in writing, to the Commissioner of Patents, expressing such desire : and the Commissioner, on due proceedings had,...
Seite 468 - Magazine for October 1840, I mentioned some instances in which I had copied printed paper and engravings on iodized paper by mere contact and exposure to the influence of calorific rays, or to artificial heat. I then, speculating on the probability of our being enabled by some such process as the one I then named, to copy pictures and the like, proposed the name of THERMOGRAPHY, to distinguish it from Photography.