On the Connexion of the Physical SciencesJ. Murray, 1858 - 523 pages |
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Page 90
... , the Arabs were in the habit of employing the vibrations of the pendulum in their astronomical observations as a measure of time . SECTION XIII . Tides - Forces that produce them - 90 SECT . XII . WEIGHTS AND MEASURES .
... , the Arabs were in the habit of employing the vibrations of the pendulum in their astronomical observations as a measure of time . SECTION XIII . Tides - Forces that produce them - 90 SECT . XII . WEIGHTS AND MEASURES .
Page 129
... vibrations to bodies in contact with it . Therefore undulations received by the air , whether it be from a sudden impulse , such as an explosion or the vibrations of a musical chord , are propagated in every direction , and produce the ...
... vibrations to bodies in contact with it . Therefore undulations received by the air , whether it be from a sudden impulse , such as an explosion or the vibrations of a musical chord , are propagated in every direction , and produce the ...
Page 130
... vibrations are the same for every individual ear of corn . Yet , as their oscillations do not all commence at the same time , but successively , the ears will have a variety of positions at any one instant . Some of the advancing ears ...
... vibrations are the same for every individual ear of corn . Yet , as their oscillations do not all commence at the same time , but successively , the ears will have a variety of positions at any one instant . Some of the advancing ears ...
Page 131
... vibrations of the aërial molecules are always extremely small , whereas the waves of sound vary from a few inches to ... vibrations . The grave or low tones are produced by very slow vibrations , which increase in frequency as the note ...
... vibrations of the aërial molecules are always extremely small , whereas the waves of sound vary from a few inches to ... vibrations . The grave or low tones are produced by very slow vibrations , which increase in frequency as the note ...
Page 132
... vibrations incomparably more frequent than any of which we are conscious , we may imaginė that animals like the Grylli , whose powers appear to commence nearly where ours terminate , may have the faculty of hearing still sharper sounds ...
... vibrations incomparably more frequent than any of which we are conscious , we may imaginė that animals like the Grylli , whose powers appear to commence nearly where ours terminate , may have the faculty of hearing still sharper sounds ...
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61 Cygni absorbed action appears atmosphere attraction bismuth blue bodies centre centrifugal force chemical circular polarization coloured rings comet consequently copper crystal dark density diamagnetic diameter diminishes direction distance disturbing earth ecliptic effect electricity equal equator ethereal medium excentricity experiments extreme force gravitation greater heat hemisphere increase intensity Jupiter latitude length lines liquid longitude luminous lunar magnetic mass mean meridian metallic miles molecules moon motion move nebula nodal lines nodes NOTE nutation observed optic axis orbit parallax paramagnetic particles passing perihelion period perpendicular phenomena plane polarized light pole position prism produced quantity rays reflected refraction refrangible retrograde motion revolution revolving right angles rotation round satellites Sir John Herschel solar spectrum sound space stars substances sun's surface telescope temperature terrestrial theory tion tourmaline transmitted tricity undulations Uranus vapour velocity vibrations violet visible Voltaic waves wire