Essays in Historical ChemistryMacmillan and Company, 1894 - 381 pages |
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Page 36
... substance ) I give the name of Phlogiston . I regard all combustible bodies , therefore , as compounds , and one of their constituents is this phlogiston the differences which we observe in combustible substances depend partly upon the ...
... substance ) I give the name of Phlogiston . I regard all combustible bodies , therefore , as compounds , and one of their constituents is this phlogiston the differences which we observe in combustible substances depend partly upon the ...
Page 37
... substance that will give up its phlogiston may be employed for that purpose . If the red lead or the calx of zinc be ... substances . We all know that if a candle is burnt in a limited amount of air the flame will shortly be extinguished ...
... substance that will give up its phlogiston may be employed for that purpose . If the red lead or the calx of zinc be ... substances . We all know that if a candle is burnt in a limited amount of air the flame will shortly be extinguished ...
Page 44
... substance fixed by iron , united to 1 part by weight of inflammable air . Modern science has completely established the correctness of Lavoisier's opinion , and disproved that of Priestley , but it has added little , even with all its ...
... substance fixed by iron , united to 1 part by weight of inflammable air . Modern science has completely established the correctness of Lavoisier's opinion , and disproved that of Priestley , but it has added little , even with all its ...
Page 48
... substance which is produced on burning brimstone in the air . You have doubtless all noticed its formation on striking an old - fashioned lucifer match . I daresay many of you have seen the beautiful etchings made upon glass by means of ...
... substance which is produced on burning brimstone in the air . You have doubtless all noticed its formation on striking an old - fashioned lucifer match . I daresay many of you have seen the beautiful etchings made upon glass by means of ...
Page 50
... substances contained in tubes filled with mercury , and standing over the mercurial trough . “ With this apparatus , after a variety of other experiments , an account of which will be found in its proper place , on the 1st of August ...
... substances contained in tubes filled with mercury , and standing over the mercurial trough . “ With this apparatus , after a variety of other experiments , an account of which will be found in its proper place , on the 1st of August ...
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Common terms and phrases
Academy alcohol ammonia amygdalin analogous Annalen appears atmosphere atomic volume atomic weights Berthelot Berzelius bodies boiling point Boyle calx carbonic acid Cavendish chemical chemists chlorine colloid combination common air composition compounds constitution contained cyanic acid Dalton Davy density dephlogisticated air determined diffusion discovery doctrine Dumas Dumas's elements equal ether existence experimental experiments fact Faraday Fermier-général FRIEDRICH WÖHLER gaseous gases generalisation Graham heat honour hydration hydrogen hypothesis inflammable inflammable air influence investigation known Kopp Kopp's laboratory labours Lavoisier Lavoisier's lectures Liebig liquid matter memoir Mendeleeff ment mercury metal method mixture mode molecular molecules nature nitric acid nitrogen observations obtained organic chemistry oxide oxygen palladium paper Philosophical phlogiston physical potassium Priestley Priestley's quantity radicle recognised REESE LIBRARY regarded relations remarkable Royal Society salts says Scheele scientific soluble solution specific gravity specific volume substances sulphate temperature theory tion tube values vapour whilst Wöhler
Popular passages
Page 235 - Jointly they establish with what we cannot but regard as a very high degree of probability the conclusion that, in any ordinary liquid, transparent solid, or seemingly opaque solid, the mean distance between the centres of contiguous molecules is less than the hundred-millionth, and greater than the two thousand-millionth of a centimetre.
Page 51 - ... it might not be so proper for us in the usual healthy state of the body: for as a candle burns out much faster in dephlogisticated than in common air, so we might, as may be said, live out too fast, and the animal powers be too soon exhausted in this pure kind of air. A moralist, at least, may say that the air which nature has provided for us is as good as we deserve.
Page 359 - 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 300 - 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 145 - 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 222 - 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 235 - 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 51 - 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 127 - Cavendish from his capital experiment was, in his own words, that " dephlogisticated air is in reality nothing but dephlogisticated water, or water deprived of its phlogiston, or in other words, that water consists of dephlogisticated air united to phlogiston, and that inflammable air is either pure phlogiston, or else water united to phlogiston...
Page 113 - In this situation, I saw reason to embrace what is generally called the heterodox side of almost every question.