The Art of Scientific Discovery: Or, The General Conditions and Methods of Research in Physics and ChemistryLongmans, Green, and Company, 1878 - 648 sider |
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Side 32
... produce some effect ; and the effect is probably more or less different in every different sub- stance , and in the same substance at every different temperature . In a vacuum it repels bodies , in black sub- stances it produces heat ...
... produce some effect ; and the effect is probably more or less different in every different sub- stance , and in the same substance at every different temperature . In a vacuum it repels bodies , in black sub- stances it produces heat ...
Side 33
... produced by heat in even so apparently simple a substance as iron were so numerous in some of the experiments as to produce the impression that the metal was endowed with vitality . ' This simultaneous change of properties is a general ...
... produced by heat in even so apparently simple a substance as iron were so numerous in some of the experiments as to produce the impression that the metal was endowed with vitality . ' This simultaneous change of properties is a general ...
Side 34
... produced in bodies generally by alteration of pressure or temperature , even when viewed by the aid of our imperfect means and extremely incom- plete knowledge of its effects , are often so profound that they point to the conclusion ...
... produced in bodies generally by alteration of pressure or temperature , even when viewed by the aid of our imperfect means and extremely incom- plete knowledge of its effects , are often so profound that they point to the conclusion ...
Side 36
... produced we do not yet know . Frequently , when mental action is strong , the head be- comes suddenly hot and the ... produce physical cerebral impressions , and sensations originally precede ideas . According to the doctrine of ...
... produced we do not yet know . Frequently , when mental action is strong , the head be- comes suddenly hot and the ... produce physical cerebral impressions , and sensations originally precede ideas . According to the doctrine of ...
Side 37
... produce physical and chemical effects , we can very much more completely realise the order of effects which those forces produce ; and our conceptions of ultimate power , of causation , and of the relations of cause and effect , depend ...
... produce physical and chemical effects , we can very much more completely realise the order of effects which those forces produce ; and our conceptions of ultimate power , of causation , and of the relations of cause and effect , depend ...
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Almindelige termer og sætninger
acid action alkali amount appear astronomical beliefs bodies cause chemical chemical affinity chemistry circumstances complete compounds conclusions consciousness covery degree detect discovered earth effect electric electric current elementary bodies employed enabled error essential evidence excite existence experiments extensive facts Faraday forces galvanometer gases heat heat-conductors hydrogen hypotheses ideas important impressions Inductive Sciences inference instance intellect invention kind Klaproth known labour large number laws Laws of Thought less Leyden jar light liquid logical magnetism matter means ment metals method mind motion nature Newton observation obtained original research oxygen particular perceive perception pheno phenomena phenomenon phlogiston physical possess principles probably produce properties proposition proved qualitative quantitative R. W. Dale reason requires Royal Society rubidium scientific investigator scientific research scientific truths senses similar specific gravity stances statement substances temperature thallium theory things thought tion tricity true usually various Whewell whilst
Populære passager
Side 372 - One science only will one genius fit ; So vast is art, so narrow human wit : Not only bounded to peculiar arts, But oft in those confined to single parts.
Side 600 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules...
Side 293 - It is a pleasure to stand upon the shore and to see ships tossed upon the sea; a pleasure to stand in the window of a castle and to see a battle and the adventures thereof below; but no pleasure is comparable to the standing upon the vantage ground of truth (a hill not to be commanded, and where the air is always clear and serene), and to see the errors and wanderings and mists and tempests in the vale below; so always that this prospect be with pity, and not with swelling or pride.
Side 275 - I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.
Side 407 - The sun's rays are the ultimate source of almost every motion which takes place on the surface of the earth. By its heat are produced all winds, and those disturbances in the electric equilibrium of the atmosphere which give rise to the phenomena of lightning, and probably also to those of terrestrial magnetism and the aurora.
Side 96 - I think it may not be amiss to take notice, that however faith be opposed to reason, faith is nothing but a firm assent of the mind : which if it be regulated, as is our duty, cannot be afforded to any thing but upon good reason ; and so cannot be opposite to it. He that believes, without having any reason for believing, may be in love with his own fancies; but neither seeks truth as he ought, nor pays the obedience due to his Maker...
Side 387 - Accurate and minute measurement seems to the non-scientific imagination a less lofty and dignified work than looking for something new. But nearly all the grandest discoveries of science have been but the rewards of accurate measurement and patient long-continued labour in the minute sifting of numerical results.
Side 181 - ... by art, seems to be done with equal efficacy, though more slowly, by nature, in the formation of varieties of mankind, fitted for the country which they inhabit. Of the accidental varieties of man, which would occur among the first few and scattered inhabitants of the middle regions of Africa, some one would be better fitted than the others to bear the diseases of the country.
Side 285 - Saturn, the spots in the sun, and its turning on its own axis", the inequalities and selenography of the moon, the several phases of Venus and Mercury, the improvement of telescopes, and grinding of glasses for that purpose, the weight of air, the possibility, or impossibility of vacuities, and nature's abhorrence thereof, the Torricellian experiment in quicksilver, the descent of heavy bodies, and the degrees of acceleration therein ; and divers other things of like nature.