Essays in Historical ChemistryMacmillan and Company, limited, 1902 - 582 pages |
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Page 20
... means of it he demonstrated how dependent is the boiling - point of a liquid upon the atmospheric pressure . Having boiled some water " a pretty while that by the heat it might be freed from the latitant air , " he placed it , whilst ...
... means of it he demonstrated how dependent is the boiling - point of a liquid upon the atmospheric pressure . Having boiled some water " a pretty while that by the heat it might be freed from the latitant air , " he placed it , whilst ...
Page 28
... means of introducing into the marine a method of obtaining fresh water from sea- water , not very dissimilar to that which we owe to the late Dr. Normandy : this method , I need scarcely add , is not that of the ingenious youth who ...
... means of introducing into the marine a method of obtaining fresh water from sea- water , not very dissimilar to that which we owe to the late Dr. Normandy : this method , I need scarcely add , is not that of the ingenious youth who ...
Page 36
... for them , he says , if , like himself , they should have no very fine ear or exquisite taste , as by this means they will be more easily pleased , and be less apt to be offended when the performances 36 II JOSEPH PRIESTLEY.
... for them , he says , if , like himself , they should have no very fine ear or exquisite taste , as by this means they will be more easily pleased , and be less apt to be offended when the performances 36 II JOSEPH PRIESTLEY.
Page 43
... some . Priestley at this time had little or no knowledge of chemistry ; he was possessed of no apparatus , and had scarcely the means of procuring any . But these " " very circumstances were the sources of his success II 43 JOSEPH ...
... some . Priestley at this time had little or no knowledge of chemistry ; he was possessed of no apparatus , and had scarcely the means of procuring any . But these " " very circumstances were the sources of his success II 43 JOSEPH ...
Page 44
... means and peculiar views . " If , " he says , " I had been previously accus- tomed to the usual chemical processes , I should not have so easily thought of any other , and without new modes of operation I should hardly have discovered ...
... means and peculiar views . " If , " he says , " I had been previously accus- tomed to the usual chemical processes , I should not have so easily thought of any other , and without new modes of operation I should hardly have discovered ...
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Common terms and phrases
Academy action alcohol amygdalin Annalen appears atomic weights benzene Berthelot Berzelius bodies boiling point Boyle calx Cannizzaro carbonic acid Cavendish century Chemical Society chemists chlorine colloid combination common air composition compounds constitution contained Dalton Davy decomposed density determined diffusion discovery doctrine Dumas elements ether ethyl existence experimental experiments fact Faraday Fermier-général gaseous gases Graham heat honour hydrate hydrogen hydroxylamine hypothesis inflammable inflammable air influence investigation isomeric known Kopp Kopp's laboratory labours Lavoisier Lavoisier's lectures Liebig liquid matter memoir Mendeleeff mercury metal method Meyer mixture mode molecular molecules nature nitric acid nitrogen observations obtained organic chemistry oxide oxygen palladium paper Philosophical phlogiston physical platinum potassium Priestley Priestley's Professor quantity radicle recognised regarded relations remarkable Royal Society salts says Scheele scientific soluble solution specific gravity specific volume substances sulphate sulphur temperature theory tion tube vapour Victor Meyer Watt whilst Wöhler
Popular passages
Page 493 - Without entering into details, I will give the conclusions I then arrived at in the very words I used : — 1. The elements, if arranged according to their atomic weights, exhibit an evident periodicity of properties. 2. Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg, platinum, iridium, osmium) or which increase regularly (eg, potassium, rubidium, cesium).
Page 365 - So live, that when thy summons comes to join The innumerable caravan, which moves To that mysterious realm, where each shall take His chamber in the silent halls of death, Thou go not, like the quarry-slave at night, Scourged to his dungeon, but, sustained and soothed By an unfaltering trust, approach thy grave, Like one who wraps the drapery of his couch About him, and lies down to pleasant dreams.
Page 189 - My desire to escape from trade, which I thought vicious and selfish, and to enter into the service of Science, which I imagined made its pursuers amiable and liberal, induced me at last to take the bold and simple step of writing to Sir H. Davy...
Page 277 - It is conceivable that the various kinds of matter, now recognized as different elementary substances, may possess one and the same ultimate or atomic molecule existing in different conditions of movement. The essential unity of matter is an hypothesis in harmony with the equal action of gravity upon all bodies.
Page 292 - To form some conception of the degree of coarse-grainedness indicated by this conclusion, imagine a rain drop, or a globe of glass as large as a pea, to be magnified up to the size of the earth, each constituent molecule being magnified in the same proportion. The magnified structure would be coarser grained than a heap of small shot, but probably less coarse grained than a heap of cricketballs.
Page 58 - The feeling of it to my lungs was not sensibly different from that of common air, but I fancied that my breast felt peculiarly light and easy for some time afterwards. Who can tell but that in time this pure air may become a fashionable .article 1 Lee. cit. p. 94. in luxury ? Hitherto only two mice and myself have had the privilege of breathing it.
Page 108 - By this means upwards of 135 grains of water were condensed in the cylinder, which had no taste nor smell, and which left no sensible sediment when evaporated to dryness ; neither did it yield any pungent smell during the evaporation ; in short, it seemed pure water.
Page 153 - In this situation, I saw reason to embrace what is generally called the heterodox side of almost every question.
Page 108 - ... of common air; and that the bulk of the air remaining after the explosion is then very little more than four-fifths of the common air employed ; so that as common air cannot be reduced to a much less bulk than that by any method of phlogistication, we may safely conclude, that when they are mixed in this proportion, and exploded, almost all the inflammable air, and about one-fifth part of the common air, lose their elasticity, and are condensed into the dew which lines the glass.
Page 44 - But I have often thought that, upon the whole, this circumstance was no disadvantage to me ; as, in this situation, I was led to devise an apparatus and processes of my own, adapted to my peculiar views ; whereas, if I had been previously accustomed to the usual chemical processes, I should not have so easily thought of any other, and without new modes of operation, I should hardly have discovered anything materially new.