The Philosophical Magazine and Journal: Comprehending Various Branches of Science, the Liberal and Fine Arts, Agriculture, Manufactures, and Commerce, Volume 50Richard Taylor and Company, 1817 |
Contents
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Common terms and phrases
accident acid gas appears applied Armenia asthma atmosphere attraction Basalt bodies Bridlington caloric cameleon carbonic acid cast cast-iron boiler cause chemical cirrostratus Cloudy coal colour combustion common condensing consequence construction cumuli degree diameter Ditto dyspnoea earth effect equal expansive force experiments explosion Fair feet fine day fire flame fluid galvanism habitual asthma heat high pressure engine hydrogen Idem inch iron light low pressure engine manganese matter means mercury metal mineral mixture moon motion mountains nature observed opinion oxide oxygen particles phænomena plants plates platinum potash pounds present pressure boilers principle produced proportion proved quantity rain rays rocks and strata safety safety-valve Shinar showers star-light steam steam-boats strata stratum substance sulphuric sulphuric acid suppose surface temperature theory THOMAS TREDGOLD Tilloch tion tube turnsole valve vegetable vessel weight wheel Whin Sill wind wire wrought wrought-iron boiler
Popular passages
Page 67 - And the waters decreased continually until the tenth month: in the tenth month, on the first day of the month, were the tops of the mountains seen.
Page 53 - I shall propose to the committee is, that the chairman be directed to move the House that leave be given to bring in a bill to put an end to the Established Church in Ireland, and to make provision in respect of the temporalities thereof, and in respect of the Royal College of Maynooth.
Page 73 - A Practical Inquiry into the Causes of the frequent Failure of the Operations of Depression, and of the Extraction of the Cataract, as usually performed ; with the Description of a Series of new and improved Operations, by the Practice of which most of these Causes of Failure may be avoided.
Page 4 - Effects of Rarefaction, by partly removing the Pressure of the Atmosphere, upon Flame and Explosion*." The experiments of the latter show that rarefaction produces striking alterations in the size and character of the flame, but do not touch the question of the relative rate of burning under different pressures : they test the comparative combustibility of...
Page 12 - It would appear then that the heat given out by the compression of gases, is the real cause of the combustion which it produces ; and that at certain elevations of temperature, whether in rarefied or compressed atmospheres, explosion or combustion occurs ; that is, bodies combine with the production of heat and light.
Page 36 - Rather admire; or if they list to try Conjecture, he his fabric of the Heavens Hath left to their disputes, perhaps to move His laughter at their quaint opinions wide Hereafter, when they come to model Heaven And calculate the stars, how they will wield The mighty frame; how build, unbuild, contrive To save appearances; how gird the sphere With centric and eccentric scribbled o'er, Cycle and epicycle, orb in orb...
Page 26 - I placed the whole apparatus in a large receiver, in which, by means of a gas-holder, the air could be contaminated to any extent with coal gas. As soon as there was a slight admixture of coal gas, the platinum became ignited; the ignition continued to increase till the flame of the wick was extinguished, and till the whole cylinder became filled with flame ; it then diminished.
Page 24 - It appeared to me, therefore, probable, that in certain combinations of gaseous bodies, for instance, those above referred to, when the increase of temperature was not sufficient to render the gaseous matters themselves luminous ; yet still it might be adequate to ignite solid matters exposed to them.
Page 403 - ... the wood ; so that no connexion whatever remains between the two parts of the bark, but the bare and naked wood appears white and smooth. But this bark-ring, which is to compel the tree to bear, must be made at the right time, that is, when in all nature the buds are strongly swelling or are breaking out into blossom.
Page 25 - ... sufficient quantity of vapour and of air remain in the glass. When the experiment on the slow combustion of ether is made in the dark, a pale phosphorescent light is perceived above the wire, which of course is most distinct when the wire ceases to be ignited. This appearance is connected with the formation of a peculiar acrid volatile substance possessed of acid properties. The chemical changes in general produced by slow combustion appear worthy of investigation.