Appendix II*

about three Hours before Noon, or as milchafter Noon. The Meridian of the Placemay be found by this Method so exact, thatthat it will not differ at any time from thetrue Meridian above 10/ Time, and if aproper Allowance be made for the Refrac-tion at the Time of Observation, it may befound much more exact. This Line thusfound will be of use to save Trouble after-wards ; and is, indeed, the Foundation ofail astronomical Observations.

< To find a Star or Planet In the Day-time ,even at Noon-Day.

The Instrument remaining as rectifiedin the last Experiment, you set the Becli-nation-Semicircle to the Declination of theStar or Planet you want to fee; and thenyou set the Equatorial Plate to the RightAscension of the Star or Planet at thattime, and, looking through the Telescope,you will see the Star or Planet; and afteryou have once got into the Field, youcannot lose it: For, as the diurnal Motionof a Star is parallel to the Equator, byyour moving the Equatorial Handle so asto follow it, you will at any time, whileD d 2 it

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