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 35
... various external and internal causes , by external objects or forces acting through the senses , by physical or 1 Philosophical Magazine , vol . v . , 1853 , pp . 17-27 . 6 mental excitement of the brain , by memory and D 2.
... various external and internal causes , by external objects or forces acting through the senses , by physical or 1 Philosophical Magazine , vol . v . , 1853 , pp . 17-27 . 6 mental excitement of the brain , by memory and D 2.
Side 36
... memory and associative suggestion , & c .; but how it is produced we do not yet know . Frequently , when mental action is strong , the head be- comes suddenly hot and the feet cold . The seat of per- ception and ideas is believed to be ...
... memory and associative suggestion , & c .; but how it is produced we do not yet know . Frequently , when mental action is strong , the head be- comes suddenly hot and the feet cold . The seat of per- ception and ideas is believed to be ...
Side 39
... memory alone remains as a source of mental excite- ment ; and by persistent exclusion of the more exciting ideas only , memory also becomes unconscious . As , how- ever , by withdrawing the mental perception from one class of ideas it ...
... memory alone remains as a source of mental excite- ment ; and by persistent exclusion of the more exciting ideas only , memory also becomes unconscious . As , how- ever , by withdrawing the mental perception from one class of ideas it ...
Side 41
... memory for numbers - to the extent , it is said , of being able to recall the first six powers of any number under 100 - but also a kind of divining power , by which he perceived , almost at a glance , the factors of which his formula ...
... memory for numbers - to the extent , it is said , of being able to recall the first six powers of any number under 100 - but also a kind of divining power , by which he perceived , almost at a glance , the factors of which his formula ...
Side 47
... memory . Strong impressions produce the most vivid ideas . The more vivid also the original impression , and the more perfect the action of the memory , the stronger and more distinct is the idea . The clearest ideas are those of simple ...
... memory . Strong impressions produce the most vivid ideas . The more vivid also the original impression , and the more perfect the action of the memory , the stronger and more distinct is the idea . The clearest ideas are those of simple ...
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acid action amount appear beliefs bodies Caroline Herschel cause cerebrum chemical chemical affinity chemistry circumstances classification complete conclusions consciousness covery degree depends detect discovered effect electric current electricity elementary bodies enable energy error essential evidence excite existence experiments extensive facts faculties false Faraday forces G. C. Lewis galvanometers heat heat-conductors human hypotheses ideas important impressions Inductive Sciences inference infinite instance intellect invention kind Klaproth known labour Laws of Thought less Leyden jar light logical magnetism matter means ment mental method mind motion nature nearly Newton observation obtained occult original research perceive perception persons pheno phenomena phenomenon phlogiston possess Principles of Science probably produce proposition proved qualitative quantitative R. W. Dale reason requires Royal Society scientific discovery scientific investigator scientific knowledge scientific truths senses similar statement substances temperature thallium things thought tion true universal usually various Whewell whilst
Populære passager
Side 273 - 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 370 - 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 598 - Avogadro's law states that equal volumes of all gases at the same temperature and pressure contain the same number of molecules...
Side 98 - So it is in contemplation; if a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts, he shall end in certainties.
Side 94 - 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 291 - 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...
Side 175 - The second supposition is this, that all bodies whatsoever that are put into a direct and simple motion, will so continue to move forward in a straight line till they are, by some other effectual powers, deflected, and sent into a motion describing a circle, ellipsis, or some other more compounded curve line. The third supposition is, that these attractive powers are so much the more powerful in operating by how much the nearer the body wrought upon is to their own centres.
Side 283 - Our business was (precluding matters of theology and state affairs) to discourse and consider of philosophical enquiries, and such as related thereunto: — as Physick, Anatomy, Geometry, Astronomy, Navigation, Staticks, Magneticks, Chymicks, Mechanicks, and Natural Experiments; with the state of these studies and their cultivation at home and abroad.
Side 385 - 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 179 - ... 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.