Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 77
John Frederick William Herschel. of the imperfections incident to every work the latter can place in his hands . He must , therefore , endeavour so to combine his observations , so to choose his opportunities , and so to familiarize ...
John Frederick William Herschel. of the imperfections incident to every work the latter can place in his hands . He must , therefore , endeavour so to combine his observations , so to choose his opportunities , and so to familiarize ...
Сторінка 86
... latter is ) uniform . It is subject to fluctuations , whose laws become matter of investigation . But to pursue these laws , we re- quire nicer means of observation than what we have de- scribed , and are obliged to call in to our aid ...
... latter is ) uniform . It is subject to fluctuations , whose laws become matter of investigation . But to pursue these laws , we re- quire nicer means of observation than what we have de- scribed , and are obliged to call in to our aid ...
Сторінка 87
... latter reckoning . This usage has its advantages and disadvantages , but the latter seem to preponderate ; and it would be well if , in con- sequence , it could be broken through , and the civil reckoning substituted . Uniformity in ...
... latter reckoning . This usage has its advantages and disadvantages , but the latter seem to preponderate ; and it would be well if , in con- sequence , it could be broken through , and the civil reckoning substituted . Uniformity in ...
Сторінка 88
... latter instruments . In one case only has the revival of its use been proposed ; viz . for the accurate measurement of very small portions of time , by the flowing out of mercury from a small orifice in the bottom of a vessel , kept ...
... latter instruments . In one case only has the revival of its use been proposed ; viz . for the accurate measurement of very small portions of time , by the flowing out of mercury from a small orifice in the bottom of a vessel , kept ...
Сторінка 91
... latter at the same time , and occupying the same precise place as the image of the distant star E. The magnifying power of the lens renders perceptible the smallest deviation from perfect coinci- dence , which , should it exist , is a ...
... latter at the same time , and occupying the same precise place as the image of the distant star E. The magnifying power of the lens renders perceptible the smallest deviation from perfect coinci- dence , which , should it exist , is a ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
angle angular appear apsides ascertained astronomical axis bright calculation celestial centre circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe heavens heliocentric horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations planet planetary pole portion position Post 8vo precession proper motions proportion recede recess reckoned refraction respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith
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Сторінка 674 - A Dictionary of Science, Literature, and Art : Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge ; with the Derivation and Definition of all the Terms in General Use. Edited by WT BRANDE, FRSL and E.