C 2 44 1 
fhewn). And thus the Inftrument is ready for Ob- 
fervation. 
To find the Hour of the T)ay , and Meridian of 
the Tlace . 
Firft find, from aftronomical Tables, the Sun’s De- 
clination for the Day, and for that parricular Time 
of the Day; then fet the Declination-Semicircle to 
the Declination of the Sun, taking particular Notice 
whether it is North or South, and fet the Declina- 
tion-Semicircle accordingly. 
You then turn about the Horizontal Handle, and 
the Equatorial Handle, both at the fame time, till 
you find the Sun precifely concentrical with the* Field 
of the Teiefcope. If you have a Clock or Watch 
at hand, mark thatlnftant of Time; and by looking 
upon the Equatorial Plate, and Nonius Index, you 
will find the Hour and Minute of the Day, which 
comparing with the Time fhewn by the Clock or 
Watch, fhews how much either of them differ from 
the Sun. In this manner you find the Hour of the 
Day. 
Now, in order to find the Meridian of the Place, 
and confequently to have a Mark, by which you 
may always know your Meridian again, you firft 
move the Equatorial Plate, by means of the Equatorial 
Handle, till the Meridian of the Plate, or Hour-line 
of n. is in the Middle of the Nonius Index; and 
then, by turning about the Declination-Handle till 
the Teiefcope comes down to the Horizon, you ob- 
lerve the Place or Point which is then in the Middle 
of the Field of the Teiefcope ; and a fuppofed Line 
drawn from the Center of this Field to that Point in 
the 
