The Philosophical Magazine and Journal: Comprehending Various Branches of Science, the Liberal and Fine Arts, Agriculture, Manufactures, and Commerce, Volume 60Richard Taylor and Company, 1822 - Physics |
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Common terms and phrases
acid action alloy altitude ammonia angles appears ascertain astronomers atmosphere attraction axis blast furnace bloomery boat Boulton & Watt calculated circle claystone Cloudy colour consequence constructed contains copper correct crystals DAVID MUSHET degree diameter distance ditto ditto eclipse effect electrical engine equal equation error experiments feet fluid furnace gentlemen genus give given Glasgow Greenock heat Holyhead horizontal improvement inches instrument iron latitude length London longitude Magazine and Journal magnetic matter means ment mercury metal method moon moon's motion muriate muriatic acid needle nutation object observations observatory obtained paper parallax particles phænomena Philosophical Magazine plant plates platina present produced proportion pyrites quantity refraction remarks rhodium right ascension Royal says sea-water Showery species specific gravity stars steam-boats steel sufficient sulphuric acid suppose surface tables telescope temperature thermometer tion vapour vessel wire wootz
Popular passages
Page 134 - Account of an Assemblage of Fossil Teeth and Bones of Elephant, Rhinoceros, Hippopotamus, Bear, Tiger, and Hyaena, and Sixteen other Animals ; discovered in a Cave at Kirkdale, Yorkshire, in the Year 1821 : with a comparative View of five similar Caverns in various Parts of England, and others on the Continent.
Page 362 - Sheffield ; and being prevented by other avocations from giving personal attendance, the superintendence of the work was consequently intrusted to an intelligent and confidential agent. To him the steel, together with the alloying metals in the exact proportion, and in the most favourable state for the purpose, was forwarded, with instructions to see the whole of the metals, and nothing else, packed into the crucible, and placed in the furnace, to attend to it while there, and to suffer it to remain...
Page 112 - Stanhope constructed a beat to be moved by steam. In 1801 Mr. Symington tried a boat that was propelled by steam on the Forth and Clyde navigation. Still no practical uses resulted from any of these attempts. It was not till the year 1807, when the Americans began to use steam-boats on their rivers, that their safety and utility were first proved. But the whole merit of constructing these boats is due to natives of Great Britain ; Mr. Henry Bell, of Glasgow, gave the first model of them to Mr.
Page 362 - This is given as an instance, showing that nickel with steel is much more subject to oxidation than when combined with iron. The alloys of steel with rhodium are likely to prove highly valuable. The scarcity of that metal must, however, operate against its introduction to any great extent. It is to Dr. Wollaston we are indebted, not only for suggesting the trial of rhodium, but also for a liberal supply of the metal, as well as much valuable information relative to fuel, crucibles, &c.
Page 362 - ... well as compared with the similar products of the laboratory. From the external appearance, as well as from the texture of the part when broken by the blow of the hammer, we were able to form a tolerably correct judgment as to its general merits ; the hardness, toughness, and other properties, were farther proved by severe trials, after being fashioned into some instrument, or tool, and properly hardened and tempered.
Page 362 - If steel and silver be kept in fusion together for a length of time, an alloy is obtained, which appears to be very perfect while the metals are in the fluid state, but on solidifying and cooling, globules of pure silver are expressed from the mass, and appear on the surface of the button. If an alloy of this kind be forged into a bar, and then dissected by the action of dilute sulphuric acid, the silver appears...
Page 362 - ... not, however, to the same extent; that with the nickel being but slightly acted upon, comparatively to the action on the pure iron : it thus appears that nickel, when combined with iron, has some effect in preventing oxidation, though certainly not to the extent that has at times been attributed to it. It is a curious fact, that the same quantity of the nickel alloyed with steel, instead of preventing its rusting, appeared to accelerate it very rapidly.
Page 368 - The blade of a sabre, or some such instrument, made from this alloy, and treated in this way, would assuredly be beautiful, whatever its other properties might be ; for of the value of the chrome alloy for edge tools we are not prepared to speak, not having made trial of its cutting powers. The sabre blade, thus coloured, would amount to a proof of its being well tempered; the blue back would indicate the temper of a watch spring; while the straw colour towards the edge would announce the requisite...
Page 64 - London's Encyclopaedia of Agriculture: comprising the Laying-out, Improvement, and Management of Landed Property, and the Cultivation and Economy of the Productions of Agriculture. With 1,100 Woodcuts. 8vo. 21s. London's Encyclopaedia of Gardening: comprising the Theory and Practice of Horticulture, Floriculture, Arboriculture, and Landscape Gardening.
Page 361 - This had not taken place throughout the whole mass; the metal had soon melted and run to the bottom ; but having been continued in the furnace for a considerable time, the surface of the button had received an additional portion of charcoal, and had become plumbago. It was soft, sectile, bright, stained paper, and had every other character of that body ; it was indeed in no way distinguishable from it. The internal part of these plumbago buttons was a crystalline carburet : a portion of it having...