Astronomical Dialogues.
53
counted for. But we have made a long Excursion from our Globes; pray let's return to them: And let me see what I shall be the better for knowing how to rectify the Globes, and to patch on the Planets, as you just now have shewed me the Way of.
Hour Circle and Index.Madam, said I, bring the Sun's Place, for May 10, to the graduated Side of the Meridian, and then turn or set the Index of the Hour-Circle (placed here as you see upon the Brass Meridian about the Pole) to Twelve at Noon; and then your Globe will be fitted to shew you the State of the Heavens. As it now stands, the Mark for the Sun represents his being on the Meridian, as he is every Day at Noon; and there it will shew the Sun's Meridian Altitude above the South Part of the Horizon to be 58 Degr. 42 Min. Then if you will bring that Mark to the Eastern Edge of the Wooden Horizon, you will see there what Point of the Compass the Sun rises upon, and your Index will shew you the Time of it; and if you bring the Sun's Place to the Western Edge, you will find how far from the true West Point the Sun sets, and what a Clock it is when he goes down, as we call it: Thus, May 10, the sun rises about 34 ofan
