...which, with the magnets, may be made to revolve round the axis. It is evident, that if the axis be inclined to the horizon at an angle equal to the latitude of the place of observation, and so that the azimuth of its lower extremity from south of the magnetic meridian...

...far it would afterwards recede on the horizontal plane. 53. If a ladder leaning against a S. wall be inclined to the horizon at an angle equal to the latitude of the place; shew that the shadow will occupy the same situation every day at the same hour; and determine the position...

...for describing the meridians and parallels. 22. A ladder leaning against a south wall happens to be inclined to the horizon at an angle equal to the latitude of the place : shew that the shadow will occupy the same situation every day at the same hour ; and determine the...

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...telescope turning upon an axis supported by a framework or shaft placed parallel to the earth's axis, or inclined to the horizon at an angle equal to the latitude of the Observatory. This framework or shaft turns freely upon pivots at each extremity ; and from the circumstance...

...other hand, it is requisite that the optical apparatus be placed in the plane of the meridian, and inclined to the horizon at an angle equal to the latitude of the place ; and to do this is often both inconvenient and difficult, though when once accomplished, it always...

...perpendicular to the card. If this axis be laid N. and S., and the north end (in north lat.) raised up till it is inclined to the horizon at an angle equal to the latitude, it will represent the polar axis round which the celestial bodies revolve, the card representing the...

...noon is a gnomon, with a straight edge, or pair of edges, parallel to the earth's axis, and therefore inclined to the horizon at an angle equal to the latitude of the place, with a plate for the gnomon to throw a shadow on. Thus an Indian Bun-dial has its gnomon nearly level,...

...to are, (1) that it shall be level as regards east and west, (2) that the axis of the ring shall be inclined to the horizon at an angle equal to the latitude of the place, (8) that the plane passing through the axis of the ring and the meridian line marked on its inside...

...perpendicular to the card. If this axis be laid N. and S., and the north end (in north lat.) raised up till it is inclined to the horizon at an angle equal to the latitude, it will represent the polar axis round which the celestial bodies revolve, the card representing the...