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A Journal of Natural Philosophy, Chemistry and the Arts, Volumen22
Vista completa - 1809
almoſt alſo antimony aſcertain atmoſphere becauſe beſt caloric carbonic acid caſe cauſe Ceres circumſtances cloſe colour combuſtion compoſed condenſer confiderable conſequence conſiſts copper courſe cryſtals decompoſition deſcribed deſcription diminiſhed diſcovered diſſolved diſtance diſtilled diſtinguiſh eaſily exceſs exiſt experiments expoſed filtered firſt fluid glaſs greateſt heat hidrogen inches increaſe inſtance inſtead inſtrument iron itſelf laſt leaſt leſs likewiſe loſs meaſure mercury metal moſt motion muriatic acid muſt neceſſary nitric acid obſervations occaſioned oxide oxigen paſſed Philoſophical phoſphoric pile planet plate poſition potaſh preſent proceſs produćt purpoſe pyrites quantity raiſed reaſon reſpect reſults riſe ſalt ſame ſaturated ſay ſecond ſee ſeems ſeen ſeparated ſeveral ſhall ſhallow ſhew ſhould ſide ſimilar ſmall ſolid ſolution ſome ſoon ſquare ſtars ſtate ſtill ſtone ſubject ſubſtance ſuch ſufficient ſulphate ſulphuret ſulphuric acid ſun ſupport ſuppoſed ſurface ſuſpended teleſcope temperature thermometer theſe thoſe tion uſed uſual veſſel zinc
Página 275 - 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 75 - 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 224 - ... 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 77 - 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 78 - 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 182 - 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.