The Problem of Human Life: Embracing the "evolution of Sound" and "evolution Evolved," with a Review of the Six Great Modern Scientists, Darwin, Huxley, Tyndall, Haeckel, Helmholtz, and MayerHall, 1877 - Всего страниц: 512 |
Результаты поиска по книге
Результаты 1 – 5 из 96
Стр. 77
... tone there . But if the sound - producing instrument vibrates rapidly , the sonorous discharges must necessarily pass off with a corresponding rapidity , and reach the ear with a corre- spondingly higher pitch of tone . Such discharges ...
... tone there . But if the sound - producing instrument vibrates rapidly , the sonorous discharges must necessarily pass off with a corresponding rapidity , and reach the ear with a corre- spondingly higher pitch of tone . Such discharges ...
Стр. 81
... tone is produced by these vi- brations no motion whatever will be com- municated to the unison neighbor , though it necessarily and continuously receives the synchronous air - waves driven against it by the actuating body . I have ...
... tone is produced by these vi- brations no motion whatever will be com- municated to the unison neighbor , though it necessarily and continuously receives the synchronous air - waves driven against it by the actuating body . I have ...
Стр. 82
... Tone that Professor Tyndall caught the above inspiration . This great German authority says , in speaking of the resonant effects of sounding - boards : - " As we have had already occasion to remark , sensible portion of their motion to ...
... Tone that Professor Tyndall caught the above inspiration . This great German authority says , in speaking of the resonant effects of sounding - boards : - " As we have had already occasion to remark , sensible portion of their motion to ...
Стр. 83
... tone , as every one admits , depends on the number of vibrations per second of the sounding body . In the second place , the tone of a string never changes its pitch in being transferred to and augmented by the sounding - board ; and ...
... tone , as every one admits , depends on the number of vibrations per second of the sounding body . In the second place , the tone of a string never changes its pitch in being transferred to and augmented by the sounding - board ; and ...
Стр. 84
... tone from the string's normal rate to that of the vibrating body whose waves actually produce a hundred - fold more tone ? If the wave - theory be correct , that resonance is really caused by the vibratory motion of the board , then ...
... tone from the string's normal rate to that of the vibrating body whose waves actually produce a hundred - fold more tone ? If the wave - theory be correct , that resonance is really caused by the vibratory motion of the board , then ...
Другие издания - Просмотреть все
Часто встречающиеся слова и выражения
absolutely absurdity admit air-particles air-waves amplitude animals argument atmosphere atoms cause compressed condensations and rarefactions constituting corporeal corpuscles Darwin demonstrated distance drum-skin embryo entirely evidence evolution evolutionists exactly existence explain fact feet a second force fork gemmules Haeckel heat Hence Huxley hypothesis inches intelligent intelligent design iron Joseph Cook logical marsupial mechanical ment mind monera moneron natural selection necessarily organism Origin of Species orohippus oscillation over-tones ovule pangenesis pantheism particles phenomena philosophical physical physicists pitch produced Prof Professor Helmholtz Professor Tyndall prong proof prove pulses rarefactions reader reason result scientific single siren sonorous soul sound-pulse sound-waves species spontaneous stridulation string structure substance substantial supposed sympathetic vibration teaches theory of descent thing tion tone transmutation true truth tube tuning-fork tympanic membrane undulatory unison velocity of sound vital and mental water-waves wave-length wave-motion wave-theory of sound waves
Популярные отрывки
Стр. 450 - If such do occur, can we doubt (remembering that many more individuals are born than can possibly survive) that individuals having any advantage, however slight, over others, would have the best chance of surviving and of procreating their kind?
Стр. 450 - Several writers have misapprehended or objected to the term Natural Selection. Some have even imagined that natural selection induces variability, whereas it implies only the preservation of such variations as arise and are beneficial to the being under its conditions of life.
Стр. 394 - What limit can be put to this power, acting during long ages and rigidly scrutinising the whole constitution, structure, and habits of each creature, — favouring the good and rejecting the bad? I can see no limit to this power, in slowly and beautifully adapting each form to the most complex relations of life.
Стр. 443 - And as Natural Selection works solely by and for the good of each being, all corporeal and mental endowments will tend to progress towards perfection.
Стр. 258 - ... would have broken the glass ; had he been close to a drum-head he would have shaken the drum. We could thus transmit a push through a row of a hundred boys, each particular boy, however, only swaying to and fro. Thus, also, we send sound through the air and shake the drum of a distant ear, while each particular particle of the air concerned in the transmission of the pulse makes only a small oscillation.
Стр. 445 - Natural selection acts only by the preservation and accumulation of small inherited modifications, each profitable to the preserved being...
Стр. 29 - That gravity should be innate, inherent and essential to matter so that one body may act upon another at a distance through a vacuum, without the mediation of anything else, by and through which their action and force may be conveyed from one to another is to me so great an absurdity that I believe no man who has in philosophical matters a competent faculty of thinking can ever fall into...
Стр. 508 - If it could be proved that any part of the structure of any one species had been formed for the exclusive good of another species, it would annihilate my theory, for such could not have been produced through natural selection.
Стр. 394 - Let this process go on for millions of years; and during each year on millions of individuals of many kinds; and may we not believe that a living optical instrument might thus be formed as superior to one of glass, as the works of the Creator are to those of man ? Modes of Transition.
Стр. 254 - The same air is competent to accept and transmit the vibrations of a thousand instruments at the same time. When we try to visualise the motion of that air — to present to the eye of the mind the battling of the pulses direct and reverberated — the imagination retires baffled from the attempt.