Journal of the Chemical Society, Volumen77Chemical Society., 1900 "Titles of chemical papers in British and foreign journals" included in Quarterly journal, v. 1-12. |
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Página 30
... takes place suddenly at about 80 ° . At this temperature , the transformation proceeds at such a rate that the heat evolved cannot all escape by conduction ; the temperature therefore rises and the action is accelerated until it pro ...
... takes place suddenly at about 80 ° . At this temperature , the transformation proceeds at such a rate that the heat evolved cannot all escape by conduction ; the temperature therefore rises and the action is accelerated until it pro ...
Página 42
... takes place or its extent ( CH3 , OH , F ) . Victor Meyer has sought to find an explanation of these facts in stereo- chemical considerations , and has regarded the influence exercised by various radicles as dependent on their volume ...
... takes place or its extent ( CH3 , OH , F ) . Victor Meyer has sought to find an explanation of these facts in stereo- chemical considerations , and has regarded the influence exercised by various radicles as dependent on their volume ...
Página 47
... takes a considerable time . The wood spirit is distilled from the mixture under reduced pressure on a water - bath , the temperature of which is kept below 60 ° ; the residual solution of the alkaloids in amyl alcohol is extracted with ...
... takes a considerable time . The wood spirit is distilled from the mixture under reduced pressure on a water - bath , the temperature of which is kept below 60 ° ; the residual solution of the alkaloids in amyl alcohol is extracted with ...
Página 70
... takes place in experiment II , that is , in the presence of the ferrous salt , all traces of the dioxide disappearing within five minutes , whereas in experiment I , where iron is absent , strongly marked indications of the dioxide ...
... takes place in experiment II , that is , in the presence of the ferrous salt , all traces of the dioxide disappearing within five minutes , whereas in experiment I , where iron is absent , strongly marked indications of the dioxide ...
Página 88
... takes place in two ways ( p . 85 ) . ( 3 ) Acetone and propionic acid result from the oxidation of ßß - di- methyl - a - ethylacrylic acid , and acetic and isobutyric acids from the oxidation of ẞ - methyl - a - isopropylacrylic acid ...
... takes place in two ways ( p . 85 ) . ( 3 ) Acetone and propionic acid result from the oxidation of ßß - di- methyl - a - ethylacrylic acid , and acetic and isobutyric acids from the oxidation of ẞ - methyl - a - isopropylacrylic acid ...
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Términos y frases comunes
absorption acetone action alcohol alkali alkyl amarine ammonia ammonium amount analysis aniline aqueous solution atom barium barium chlorate benzene boiling bromine Bunsen c.c. moist nitrogen camphor carbon dioxide cent CH₂ chemical chemistry chlorate chloroform CO₂ CO₂H colour colourless compound containing cooling crystallised crystals decomposed decomposition density derivatives dilute dissolved distilled dried ester ether ethyl evaporated excess experiments formation formed formula gave glacial acetic acid grams H₂O heated hydrochloric acid hydrogen hydrogen sulphide hydrolysis hydroxide hydroximidosulphate hydroxylamine insoluble iodide iodine isoamarine isomeric light petroleum liquid melting point mercury method Meyer mixture molecular needles nitrate nitric acid nitrogen nitrogen chloride numbers obtained oxide oxygen phenylhydrazine pilocarpine potassium potassium hydroxide precipitate prepared pressure pure reaction refractive requires residue rotation salt silver small quantity sodium soluble Spectrum continuous substance sulphate sulphide sulphur dioxide sulphuric acid temperature tion Trans tube whilst yellow yield
Pasajes populares
Página 566 - To decompose the metals, then, to reform them, to change them from one to another, and to realise the once absurd notion of transmutation are the problems now given to the chemist for solution.
Página 567 - System," and although he must have heard of the electrolytic decomposition of water by Nicholson and Carlisle in 1800, nothing apparently could shake his conviction of the essential and inherent truth of the conception of phlogiston. The last of his published writings was his memoir on " The Doctrine of Phlogiston established, and that of the Composition of Water refuted.
Página 566 - Wollaston ; lastly, glance but at the new, the extraordinary powers which the chemist of our own nation put in action so successfully for the reduction of the alkalies and earths, and you will then no longer doubt that powers still progressive and advanced may exist and put at some favourable moment the bases of the metals in our hands...
Página 527 - At the moment I am engaged in a research with Kirchhoff which gives us sleepless nights. Kirchhoff has made a most beautiful and most unexpected discovery : he has found out the cause of the dark lines in the solar spectrum, and has been able both to strengthen these lines artificially in the solar spectrum and to cause their appearance in a continuous spectrum of a flame, their positions being identical with those of the Fraunhofer's lines.
Página 520 - ... whilst at the same zenith distance the sun's chemical brightness is only 36'6 times as great. Hence the value of this light as a source of the chemically active rays for photographic purposes becomes at once apparent.
Página 576 - That he may have plenty of his ingredients, let him use 20 times as much quicksilver, 20 times as much platina, and in short of anything else he pleases to use : neither he nor I can make a single grain. Pray be careful in trying what it is he makes, for the mistake must happen by not trying it rightly. My reason for not saying where it was found was that I might make some advantage of it as I have a right to do.
Página 567 - le plus riche de tous les savans; et probablement aussi, le plus savant de tous les riches.
Página 181 - After consulting some of the most eminent chemical philosophers in this country, it has been judged most proper to suggest a name founded upon one of its obvious and characteristic properties — its colour, and to call it Chlorine, or Chloric gas.* Should it hereafter be discovered to be compound, and even to contain oxygene, this name can imply no error, and cannot necessarily require a change.
Página 566 - I see plainly," he once said, " that all these new-fangled associations will finally dismantle the Royal Society, and not leave the old lady a rag to cover her." And the frown of the masterful old President meant social ostracism to all who chose to disregard it. But, unlike his predecessor, Sir John Pringle, who, on a certain memorable occasion, confessed to George III. that he was unable to reverse the laws and operations of nature, and was then told he had better resign, Banks, if he could not...
Página 564 - The voltaic battery was an alarm bell to experimenters in every part of Europe ; and it served no less for demonstrating new properties in electricity, and for establishing the laws of this science, than as an instrument of discovery in other branches of knowledge ; exhibiting relations between subjects before apparently without connection, and serving as a bond of unity between chemical and physical philosophy.