fullscreen : Adams, George: Astronomical and geographical essays containing I. A comprehensive view of the general principles of astronomy; II. The use of the celestial and terrestrial globes; III. The description and use of the armillary sphere, planetarium, tellurian, and lunarium, IV. An introduction to practical astronomy, or, the use of the quadrant and equatorial

OF  THE  GLOBES.
383
PROBLEM  XLIII.
To  make  an  erect  dial,  declining  from  the  south
towards  the  eaſt  or  west.
Elevate  the  pole  to  the  latitude  of  the  place,
and  screw  the  quadrant  of  altitude  to  the  zenith.
Then  if  your  dial  declines  towards  the  east,
(which  we  ſhall  suppose  in  the  present  instance)
count  in  the  horizon  the  degrees  of  declination,
from  the  east  point  towards  the  north,  and  bring
the  lower  end  of  the  quadrant  to  coincide  with
that  degree  of  declination  at  which  the  reckoning
ends.
Then  bring  the  first  meridian  under  the  graduated ¬
  edge  of  the  strong  brazen  meridian,  which
strong  meridian  will  be  the  horary  index.
Now  turn  the  globe  westward,  and  observe  the
degrees  cut  in  the  quadrant  of  altitude  by  the  first
meridian,  while  the  hours  XI,  X,  IX,  &c.  in
the  forenoon,  pass  successively  under  the  brazen
one  ;  and  the  degrees  thus  cut  on  the  quadrant  by
the  first  meridian,  are  the  respective  distances  of
the  forenoon  hours,  from  XII,  on  the  plane  of
the  quadrant.
For
            
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