The Study of Chemical Composition: An Account of Its Method and Historical Development, with Illustrative QuotationsUniversity Press, 1904 - 650 من الصفحات |
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طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
according affinity alcohol alkali ammonia ammonium ammonium chloride amount atomic heat atomic weight Berthollet Berzelius bodies calcination calculated calx carbonic acid chemical chemistry chemists chloride combining weight combustion composition compounds constituent containing copper Dalton deduced density determined earth elementary elements equal equivalent error existence experimental experiments fact formulae gaseous gases heat capacity Hence hydrochloric acid hydrogen hypothesis inference investigations iodate iodide iodine isomerism isomorphous Lavoisier lead mass matter mean measured mercury metal method molecular weight molecules nature nitric acid nitrogen nitrous number of atoms observed obtained oxide oxygen particles periodic law phenomena phlogiston phosphorus physical potash potassium potassium chloride principle produced properties quantities radicle ratio recognised relations represented rhombic salts silver silver iodide simple sodium solution specific gravity specific heat Stas substances sulphate sulphide sulphuric acid temperature theory tion valency vessel volume whilst whole numbers
مقاطع مشهورة
الصفحة 282 - ... even so very hard, as never to wear or break in pieces: no ordinary power being ' able to divide what God himself made One, in the first creation.
الصفحة 262 - ... and to the discovery of middle axioms. And this way is now in fashion. The other derives axioms from the senses and particulars, rising by a gradual and unbroken ascent, so that it arrives at the most general axioms last of all. This is the true way, but as yet untried.
الصفحة 263 - But the induction which is to be available for the discovery and demonstration of sciences and arts must analyse nature by proper rejections and exclusions, and then, after a sufficient number of negatives, come to a conclusion on the affirmative instances...
الصفحة 261 - Now the true and lawful goal of the sciences is none other than this: that human life be endowed with new discoveries and powers.
الصفحة 281 - Have not the small particles of bodies certain powers, virtues, or forces by which they act at a distance, not only upon the rays of light for reflecting, refracting, and inflecting them, but also upon one another for producing a great part of the phenomena of nature?
الصفحة 294 - In all chemical investigations. it has justly been considered an important object to ascertain the relative weights of the simples which constitute a compound. But unfortunately the enquiry has terminated here; whereas from the relative weights in the mass, the relative weights of the ultimate particles or atoms of the bodies might have been inferred, from which their number and weight in various other compounds would appear, in order to assist and to guide future investigations, and to correct their...
الصفحة 514 - Without offering any hypothesis regarding the cause of this symmetrical grouping of atoms, it is sufficiently evident, from the examples just given, that such a tendency or law prevails, and that, no matter what the character of the uniting atoms may be, the combining power of the attracting element, if I may be allowed the term, is always satisfied by the same number of these atoms.
الصفحة 284 - All fact-collectors, who have no aim beyond their facts, are one-story men. Two-story men compare, reason, generalize, using the labors of the fact-collectors as well as their own. Three-story men idealize, imagine, predict ; their best illumination comes from above, through the skylight.
الصفحة 260 - For he had come to his conclusion before; he did not consult experience, as he should have done, in order to the framing of his decisions and axioms ; but having first determined the question according to his will, he then resorts to experience, and bending her into conformity with his placets leads her about like a captive in a procession...
الصفحة 319 - On the other hand, since we know that the ratio of the volumes of hydrogen and oxygen in the formation of water is 2 to 1, it follows that water results from the union of each molecule of oxygen with two molecules of hydrogen.