 | Science - 1825 - 452 pages
...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 - Logarithms - 1822 - 270 pages
...the plane of the dial. We may now, as in the former case, suppose a second dial at Z, constructed in the same manner, having its plane and stile, parallel...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... | |
 | Science - 1825 - 440 pages
...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 - Industrial arts - 1831 - 508 pages
...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... | |
 | Industrial arts - 1831 - 532 pages
...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... | |
 | John Farrar - Trigonometry - 1833 - 276 pages
...; we may therefore take c 1, c 2, &c. as well as cp, of any convenient length to suit our purpose. the first, and the same time will be indicated upon...for any other latitude Z, let us suppose the plane NOR to change still further, till it comes into a vertical position facing the south, as represented... | |
 | John Farrar - Trigonometry - 1833 - 274 pages
...; we may therefore take c 1, c 2, &c. as well as cp, of any convenient length to suit our purpose. the first, and the same time will be indicated upon...for any other latitude Z, let us suppose the plane NOR to change still further, till it comes into a vertical position facing the south, as represented... | |
 | Thomas Spofford - Almanacs, American - 1835 - 84 pages
...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 - 542 pages
...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... | |
 | Encyclopedias and dictionaries - 1838 - 542 pages
...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... | |
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... for half an hour, &c., insert a rod at the centre perpendicularly to the dial plane, and place the dial so that this rod, representing the axis of the earth, shall be situated like cp, that is, in the plane of the meridian, and making an angle with... 
