_The USE of the_ GLOBES.
PROBLEM I. _To find the Latitude and Longitude
of any given Place upon the Globe; and on the
contrary, the Latitude and Longitude being given,
to find the Place._
1. Turn the globe round its axis, ’till the given place lies exactly
under the (Eastern side of the brass) meridian, then that degree upon
the meridian, which is directly over it, is the _Latitude_; which is
accordingly North or South, as it lies in the Northern or Southern
hemisphere, the globe remaining in the same position.
That degree upon the equator which is cut by the brazen meridian,
is the _Longitude_ required from the first meridian upon the globe.
If the longitude is counted both ways from the first meridian upon
the globe, then we are to consider, whether the given place lies
Easterly or Westerly from the first meridian, and the longitude must be
expressed accordingly.
The _Latitudes_ of the following places: and upon a globe where the
longitude is reckoned both ways from the meridian of _London_, their
longitudes will be found as follow:
_Latitude._ _Longitude._
Deg. Deg.
_Rome_ 41¾ North. 13 East.
_Paris_ 48¾ N. 2½ E.
_Mexico_ 20 N. 102 W.
_Cape Horn_ 58 S. 80 W.