A Journal of Natural Philosophy, Chemistry and the Arts, Volúmenes1-2 |
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A Journal of Natural Philosophy, Chemistry and the Arts, Volumen32 William Nicholson Vista completa - 1812 |
Términos y frases comunes
acetous acid afcertained alfo alkali alſo ammonia antimony atmoſphere becauſe cafe caloric camphor carbonic carbonic acid caufe cauſe Ceres circumftances colour combuftion confequence confiderable confifts copal copper cryftals decompofition diffolved diftilled diſtance drying oils effect electricity experiments falt fame fecond feems feparated feven fhall fhallow fhew fhould fide filtered fimilar fimple firft firſt fituation fluid fmall folar folid folution fome foon formed ftate fubftance fubject fuch fufficient fulphate fulphuret fulphuric acid fuppofed fupport furface glafs glaſs heat hidrogen inches increaſe inftrument iron itſelf laft lefs light lime meaſure mercury metal moft moſt motion muft muriatic acid muſt neceffary nitric acid nitrous obfervations obtained oxide oxigen paffing pile pipe planet plate pofition potaſh precipitate prefent procefs produced purpoſe pyrites quantity raiſed reafon refpecting refult ſmall ſtate ſubſtance teleſcope temperature thefe thermometer theſe thofe thoſe tion uſed veffel veſſel zinc
Pasajes populares
Página 269 - When foul weather happens soon after the falling of the mercury, expect but little of it ; and, on the contrary, expect but little fair weather, when it proves fair shortly after the mercury has risen.
Página 79 - And do not hot bodies communicate their heat to contiguous cold ones by the vibrations of this medium, propagated from them into the cold ones ? And is not this medium exceedingly more rare and subtile than the air, and exceedingly more elastic and active ? And doth it not readily pervade all bodies? And is it not, by its elastic force, expanded through all the heavens?
Página 160 - Q, so that it cannot slip. The leaden pieces D and E are cast in their places, and have no packing whatever. They move very easily ; and if at any time they should become loose, they may be spread out by a few blows with a proper instrument, without taking them out of their place. On the...
Página 248 - ... yards from each other. What he further learnt from the inhabitants of the village, concerning the phenomenon, was, that about eight o'clock in the evening, when retired to their habitations, they observed a very bright light, proceeding as from the sky, accompanied with a loud clap of thunder, which was immediately followed by the noise of heavy bodies falling in the vicinity. Uncertain whether...
Página 63 - I beg leave to add further, that on making inquiries of two children, between seven and eight years of age, now under my care, both of whom have been blind from birth, and on whom no operation has yet been performed, I find that the knowledge they have of colours, limited as it is, is sufficient to enable them to tell whether coloured objects be brought nearer to, or carried...
Página 42 - ... becomes of a deep olive brown, and when the impregnation is completed, it appears opaque, and almost black. The process is apparently owing to a simple elective attraction ; in no...
Página 80 - These seem to be most plain, genuine, and necessary conditions of this hypothesis. And they agree so justly with my theory, that if the animadversor think fit to apply them, he need not, on that account, apprehend a divorce fro'm it. But yet, how he will defend it from other difficulties, I know not.
Página 80 - Considering the lastingness of the motions excited in the bottom of the eye by light, are they not of a vibrating nature? Do not the most refrangible rays excite the shortest vibrations, the least refrangible the largest? May not the harmony and discord of...
Página 160 - ... which it oversets by the acquired motion of the weight L. The mere rise of the piston, if there were no additional motion in the tumbler, would only bring the two plugs D and E to the position of rest, namely, to close G and F, and then the engine would stop ; but the fall of the tumbler carries the plug D downwards, quite clear of the hole F, and the other plug E upwards, quite clear of the hole G. These motions require no consumption of power, because the plugs are in equilibrio, as was just...
Página 198 - A spiral wire, in the form of a reversed cone, to regulate ihe delivery of them. ... < c. An inclined iron plate, hung upon a pin on its higher end : the lower end rests on the grooved axis D, and agitates the wire B. D. The grooved axis, or grinding cylinder, which ads against the channelled iron plate E. F.