The Mechanics' Magazine, Museum, Register, Journal, and Gazette, Band 30M. Salmon, 1839 |
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Seite 8
... improvements that have taken place in steam - carriage boilers ; the inventor of such a boiler , instead of advancing , is retrograding . If the intended company will not employ Walter Hancock's simple and ingenious boiler , they had ...
... improvements that have taken place in steam - carriage boilers ; the inventor of such a boiler , instead of advancing , is retrograding . If the intended company will not employ Walter Hancock's simple and ingenious boiler , they had ...
Seite 11
... improvement consisted in the arrangement of its levers , 11 for giving and regulating the pressure . These levers are contained in the hollow of the piston , and are shown in the above figure : a , b , c , are the principal levers ...
... improvement consisted in the arrangement of its levers , 11 for giving and regulating the pressure . These levers are contained in the hollow of the piston , and are shown in the above figure : a , b , c , are the principal levers ...
Seite 13
... improvement on the ordinary pitched pavement of the coun- try ; and the only objections to its general introduction , as already noticed , are the prejudicial effects produced on it by the very intense frost with which the country is vi ...
... improvement on the ordinary pitched pavement of the coun- try ; and the only objections to its general introduction , as already noticed , are the prejudicial effects produced on it by the very intense frost with which the country is vi ...
Seite 32
... improvement in consequence of its increased breadth : - " The passenger carriages of the American railways are extremely large and commodious . They are seated for 60 passengers , and are made so high in the roof , that the tallest ...
... improvement in consequence of its increased breadth : - " The passenger carriages of the American railways are extremely large and commodious . They are seated for 60 passengers , and are made so high in the roof , that the tallest ...
Seite 41
... improvements ( if practicable ) as I have suggested , and to make them aware of the extent of the demand for it as a marketable article , and it cannot be doubted that , ere long , we should draw all our supplies from our own ...
... improvements ( if practicable ) as I have suggested , and to make them aware of the extent of the demand for it as a marketable article , and it cannot be doubted that , ere long , we should draw all our supplies from our own ...
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acid apparatus appears applied atmosphere bitumen boat boiler camera obscura carbonic acid carriage cause centre charcoal coal colour common consequence construction crucible cylinder diameter effect employed engine equal experiments feet fire fixed fluid force friction fuel furnace Galignani Grand Western Canal hour improvements inches invention iron latent heat length lever light Liverpool London machine machinery Magazine manufacture matrass matter means Mechanics ment Messrs metal method Metropolitan Railway minute mode motion object observed obtained paddle-wheel paddles paper pass patent PHOTOGENIC DRAWING piece pipe plate portion pounds present pressure produced Prussian blue purpose quantity rails Railway ratus render resistance road screw side six months specific gravity specific heat steam-engine stove strength sufficient surface tained temperature tenacity thermometer thick tion trials tube vapour vessel W. A. Robertson weight wheel zinc
Beliebte Passagen
Seite 7 - I will set before your eyes a type of a ' squirt' which hath been devised to cast much water upon a burning house, wishing a like squirt and plenty of water to be alwaies in a readinesse where fire may do harme ; for this kind of squirt may be made to holde an hoggeshed of water, or if you will, a greater quantity thereof, and may be so placed on his frame, that with ease and a smal strength, it sahl be mounted, imbased or turned to any one side, right against any fired marke, and made to squirt...
Seite 84 - As the three angles of a plane triangle are equal to two right angles, that is, to 180° (Euc, 32. 1.) the' sum of any two of them is the supplement of the other.
Seite 59 - Europe, navigated by persons possessed of a knowledge of seamanship. In this country steam navigation produces hardy seamen, and British steamers being exposed to the open sea in all weathers, are furnished with masts and sails, and must be worked by persons, who, in the event of any accident happening to the machinery, are capable of sailing the vessel, and who must therefore be experienced seamen. The case is very different in America, where, with the exception of the vessels navigating the Lakes,...
Seite 406 - We shall find (especially if the paper has been kept some weeks before the trial is made) that its sensibility is greatly diminished, and, in some cases, seems quite extinct. But if it is again washed with a liberal quantity of the solution of silver, it becomes again sensible to light, and even more so than it was at first. In this way, by alternately washing the paper with salt and silver, and drying it between times, I have succeeded in increasing its sensibility to the degree that is requisite...
Seite 236 - Nor when cold Winter keens the brightening flood, Would I weak-shivering linger on the brink.
Seite 406 - This paper, if properly made, is very useful for all ordinary photogenic purposes. For example, nothing can be more perfect than the images it gives of leaves and flowers, especially with a summer sun : the light passing through the leaves delineates every ramification of their nerves.
Seite 343 - But if the picture so obtained is first preserved so as to bear sunshine, it may be afterwards itself employed as an object to be copied ¡and by means of this second process the lights and shadows are brought back to their original disposition.
Seite 338 - The copy of a painting or the profile, immediately after being taken, must be kept in an obscure place ; it may, indeed, be examined in the shade> but in this case the exposure should be only for a few minutes ; by the Light of candles or lamps, as commonly employed, it is not sensibly affected.
Seite 339 - But in truth the difficulty is in both cases the same. The one of these takes no more time to execute than the other ; for the object which would take the most skilful artist days or weeks of labour to trace or to copy, is effected by the boundless powers of natural chemistry in the space of a few seconds.
Seite 313 - And now about the cauldron sing, Like elves and fairies in a ring, Enchanting all that you put in. SONG. Black spirits and white, Red spirits and grey ; Mingle, mingle, mingle, You that mingle may.