 | 1825 - عدد الصفحات: 452
...one. Let us imagine a plane to pass through the centre of an horizontal needle, at right angles to the meridian, and making an angle with the horizon equal to the dip; then, if the plane of a circular plate of iron coincide with this plane, and the plate be fixed... | |
 | John Farrar - 1822 - عدد الصفحات: 244
...at Z, constructed jn the same manner, having its plane and stile, parallel respectively to those of the first, and the same time will be indicated upon...for any other latitude Z, let us suppose the plane .Vf>7/ to change .still further till it comes into a vertical position facing the south, as represented... | |
 | John Farrar - 1822 - عدد الصفحات: 270
...at Z, constructed in the same manner, having its plane and stile, parallel respectively to those of the first, and the same time will be indicated upon...construct a vertical south dial for any other latitude X, let us suppose the plane NOR to change still further till it comes into a vertical position facing... | |
 | 1825 - عدد الصفحات: 440
...one. Let us imagine a plane to pass through the centre of an horizontal needle, at right angles to the meridian, and making an angle with the horizon equal to the dip ; then, if the plane of a circular plate of iron coincide with this plane, and the plate be fixed... | |
 | Perry Fairfax Nursey - 1831 - عدد الصفحات: 508
...that latitude; and hence the reason why the gnomon and hour-lines of an east or west dial must make an angle with the horizon equal to the latitude of the place for which it is constructed. Thus is explained the nature of all sun-dials whose planes are known to... | |
 | 1831 - عدد الصفحات: 532
...that latitude; and hence the reason why the gnomon and hour-lines of an east or west dial must make an angle with the horizon equal to the latitude of the place for which it is constructed. Thus is explained the nature of all sun-dials whose planes are known to... | |
 | Thomas Spofford - 1835 - عدد الصفحات: 84
...straight wire from the centre on which the diagram is drawn, towards the pole of the heavens" ; or making* an angle with the horizon equal to the latitude of the place : or the gnomon may be made of a thin plaie of brass, or thick tin, in a triangular form, and so fitted... | |
 | 1838 - عدد الصفحات: 542
...plates now in use being flat, the gnomon is in the plane of the meridian, and its sloping edge forms an angle with the horizon equal to the latitude of the place, and is consequently parallel to the axis of the earth. No sensible error is made by confounding the... | |
 | 1838 - عدد الصفحات: 542
...plates now in use being flat, the gnomon is in the plane of the meridian, and its sloping edge forms an angle with the horizon equal to the latitude of the place, and is consequently parallel to the axis of the earth. No sensible error is made by confounding the... | |
 | William Chauvenet - 1863 - عدد الصفحات: 684
...metallic bed, which supports at two points the polar or hour axis 11 of the instrument. This axis, being in the plane of the meridian, and making an angle...with the horizon equal to the latitude of the place, is parallel to the earth's axis, and, conseBequently, is directed towards the poles of the heavens.... | |
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... is, in the plane of the meridian, and making an angle with the horizon equal to the latitude of the place. 
