[ 2 45 ] 
the Horizon, is your Meridian Line. The belt time of 
the Day for making this Obfervation for finding your 
Meridian, is about three Hours before Noon, or as 
much after Noon. The Meridian of the Place may 
be found by this Method fo exaCt, that it will not 
differ at any time from the true Meridian above io" 
of Time ; and if a proper Allowance be made for the 
Refraction at the time of Obfervation, it may be 
found much more exaCt. This Line thus found will 
be of Ufe to favc Trouble afterwards ; and is, indeed, 
the Foundation of all agronomical Obfervations. 
To find a Star or Tlanet in the ^Day-timey even 
at Noon- day. 
The Inflrument remaining as rectified in the laft 
Experiment, you fet the Declination-Semicircle to 
the Declination of the Star or Planet you want to 
fee; and then you fet the Equatorial Plate to the 
Right Afcenfion of the Star or Planet at that time, 
and, looking thro J the Teiefcope, you will fee the Stat- 
or Planet ; and after you have once got it into the 
Field, you cannot lofe it : For, as the diurnal Motion 
of a Star is parallel to the Equator, by your moving 
the Equatorial Handle fo as to follow it, you will at 
any time, while it is above the Horizon, recover if, 
if ir be gone out of the Field. 
The eafieft Method for leeing a Star or Planet in 
the Day-time is this : Your Inflrument being adjufted 
as before-direCled, you bring the Teiefcope down fo 
as to look directly at your Meridian Mark ; and then 
you fet it to the Declination, and Right Afcenfion, as 
before-mentioned. 
By this Inflrument mofl of the Stars of the firft 
and fecond Magnitude have been feen even at Mid- 
day, 
