Journal of Natural Philosophy, Chemistry and the Arts, 2. kötetG. G. and J. Robinson, 1799 |
Részletek a könyvből
1 - 5 találat összesen 8 találatból.
3. oldal
... consequently renders the fuccefs of the operation very precari- ous . This inconvenience is productive of another ; namely , that it is nearly impoflible , at the instant of the production of the colour of the cinnabar , to make any ...
... consequently renders the fuccefs of the operation very precari- ous . This inconvenience is productive of another ; namely , that it is nearly impoflible , at the instant of the production of the colour of the cinnabar , to make any ...
36. oldal
... consequently supply as much air as the pipe would de- liver , provided the ftrokes fucceeded each other about once in two feconds , which appears to be a convenient rate of working , and by no means too quick . In very small bellows the ...
... consequently supply as much air as the pipe would de- liver , provided the ftrokes fucceeded each other about once in two feconds , which appears to be a convenient rate of working , and by no means too quick . In very small bellows the ...
63. oldal
... consequently , would require a fmaller degree of finishing , in the process for bringing it ultimately to a fufficient polifh ; upon which circumftance alone , now depends the certainty of our being able virtually to engrave upon glafs ...
... consequently , would require a fmaller degree of finishing , in the process for bringing it ultimately to a fufficient polifh ; upon which circumftance alone , now depends the certainty of our being able virtually to engrave upon glafs ...
135. oldal
... consequently in that ftate it retains scarcely any either of the carbonic or hydrogenous principle * , to which its combustibility was owing . And in fact , fuch wood as has become luminous is with dif- ficulty burned in the fire , and ...
... consequently in that ftate it retains scarcely any either of the carbonic or hydrogenous principle * , to which its combustibility was owing . And in fact , fuch wood as has become luminous is with dif- ficulty burned in the fire , and ...
181. oldal
... consequently less risk of its breaking when it came to be subjected to the hammer . All my precautions were ufelefs . I forged one end , which was lengthened very well without any perceptible crack ; but the extremity of this ingot ...
... consequently less risk of its breaking when it came to be subjected to the hammer . All my precautions were ufelefs . I forged one end , which was lengthened very well without any perceptible crack ; but the extremity of this ingot ...
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Gyakori szavak és kifejezések
afcertain afford againſt alfo alkali alſo appears atmoſphere azotic gas bar iron becauſe bitumen cafe camphor carbon carbonic acid caufe cauſe Charybdis cinnabar circumftances colour combuftion confequently confiderable confifts Corundum cryftals cylinder defcribed Defcription diffolved diſtance earth eſcapement experiments falt faltpetre fame fatellites fecond feems feen feparated fhall fhew fide fimilar firſt fituation fluid fmall foda folar folid folution fome formed fpring ftate fteel fubftance fubject fuch fufficient fulphate fulphuric acid fuppofed furface glafs glaſs gold grains greateſt heat inches increaſe inftrument iron itſelf laft lefs leſs mafs meaſures mercury metal moſt motion mucilage muriatic acid muſt neceffary nitre nitric acid obferved occafioned oppofite oxygen paffed pallet Philofophical phoſphorus plates pofition prefent procefs produced purpoſe quantity reaſon refpecting refult reprefented Scylla ſeparated ſeveral ſhall ſhould ſmall ſtate ſteel ſubſtance ſuch thefe theſe thofe thoſe tube uſed veffel vibration waſhing wheel
Népszerű szakaszok
355. oldal - Armenians, have a singular method of ornamenting watch cases, &c., with diamonds and other precious stones, by simply glueing or cementing them on. The stone is set in silver or gold, and the lower part of the metal made flat, or to correspond with the part to which it is to be fixed; it is then warmed gently, and...
112. oldal - ... made watertight by means of collars of oiled leather, the box was filled with cold water (viz. at the temperature of 60'), and the machine was put in motion. The result of this beautiful experiment was very striking, and the pleasure it afforded me amply repaid me for all the trouble I had had in contriving and arranging the complicated machinery used in making it.
113. oldal - BOILED ! It would be difficult to describe the surprise and astonishment expressed in the countenances of the bystanders, on seeing so large a quantity of cold water heated, and actually made to boil, without any fire.
330. oldal - The winds roared, and the rains fell. The poor white man, faint and weary, came and sat under our tree. He has no mother to bring him milk — no wife to grind his corn.
107. oldal - Being engaged lately in superintending the boring of cannon in the workshops of the military arsenal at Munich, I was struck with the very considerable degree of Heat which a brass gun acquires in a short time in being bored, and with the still more intense Heat (much greater than that of boiling water, as I found by experiment) of the metallic chips separated from it by the borer.
13. oldal - Far on the right, her dogs foul Scylla hides: Charybdis roaring on the left presides, And in her greedy whirlpool sucks the tides; Then spouts them from below: with fury driv'n, The waves mount up and wash the face of heav'n.
112. oldal - ... of the other end of it, it is evident that the machinery could be put in motion, without the least danger of forcing the box out of its place, throwing the water out of it, or deranging any part of the apparatus.
114. oldal - ... further how large a quantity of heat might be produced by proper mechanical contrivance, merely by the strength of a horse, without either fire, light, combustion, or chemical decomposition; and, in a case of necessity, the heat thus produced might be used in cooking victuals.
417. oldal - At first they could not be persuaded of the reality of the appearance ; but they soon became so thoroughly convinced, by the cliffs gradually appearing more elevated, and approaching nearer, as it were, that they pointed out, and named to me, the different places they had been accustomed to visit ; such as the Bay, the Old Head or Man, the Windmill, &c. at Boulogne ; St. Vallery, and other places on the coast of Picardy ; which they afterwards confirmed, when they viewed them through their telescopes.
138. oldal - Paulus ./Egineta fpeaks of fugar, as growing, in his time, in Europe, and alfo as brought from Arabia Felix ; the latter of which he feems to think lefs fweet than the fugar produced in Europe, and neither injurious to the Ûomach nor caufing thirft, as the European fugar was apt to do.