Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Результати 6-10 із 71
Сторінка 106
... inclination to the horizon the other way , that it had when pointed to S , and the reading off at F will not have been changed . Now unclamp the level , and , keeping it nearly horizontal , turn round the circle on the axis , so as to ...
... inclination to the horizon the other way , that it had when pointed to S , and the reading off at F will not have been changed . Now unclamp the level , and , keeping it nearly horizontal , turn round the circle on the axis , so as to ...
Сторінка 107
... inclination to the horizon . If the cross - wires of the collimator be illu- minated by a lamp , being in the focus of its object - glass , the rays from them will issue parallel , and will therefore be in a fit state to be brought to a ...
... inclination to the horizon . If the cross - wires of the collimator be illu- minated by a lamp , being in the focus of its object - glass , the rays from them will issue parallel , and will therefore be in a fit state to be brought to a ...
Сторінка 116
... inclination of the reflecting surfaces to each other . " Let A B be the limb , or graduated arc , of a por- tion of a circle 60 ° in extent , but divided into 120 equal parts . On the radius C B let a sil- vered plane glass D be fixed ...
... inclination of the reflecting surfaces to each other . " Let A B be the limb , or graduated arc , of a por- tion of a circle 60 ° in extent , but divided into 120 equal parts . On the radius C B let a sil- vered plane glass D be fixed ...
Сторінка 122
... inclination of its optical axis to the visual ray . Then when that axis coincides with the line of collimation of the object - glass , one image only will be seen , but when made to revolve on an axis perpendicular to that line , two ...
... inclination of its optical axis to the visual ray . Then when that axis coincides with the line of collimation of the object - glass , one image only will be seen , but when made to revolve on an axis perpendicular to that line , two ...
Сторінка 197
... inclination to the horizon , so that when the ball in its natural descent reached C , the tube should have been carried into the position R S , it is evident that the ball would , throughout its whole descent , be found 03 ABERRATION OF ...
... inclination to the horizon , so that when the ball in its natural descent reached C , the tube should have been carried into the position R S , it is evident that the ball would , throughout its whole descent , be found 03 ABERRATION OF ...
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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.