42 O . Appendix IL

called the Horizontal Handle, and is di uvided into 3 6o°, and has a Nonius Indexdivided into every three Minutes.

Above this horizontal Plate there is &Semicircle DD, divided into twice go° iwhich is called the Meridian Semicircle, asrepresenting the Meridian of the Place*and is moved by a Handle E, which iscalled the Meridian Handle, and has a No“nius Index divided into every three Mi-nutes.

Above this Meridian Semicircle is fas-tened a circular Plate, upon which are af-fixed two other circular Plates F F, move-able the one upon the other, and are calledthe Equatorial Plates; one of them repre-senting the Plane of the Equator, is di-vided into twice 12 Hours, and these aresubdivided into every 10 Minutes of Tbn e ‘This Plate is moved by a Handle G, calledthe Equatorial Handle, and has a NonfatIndex for strewing every Minute.

Above this Equatorial Plate there i" s 3Semicircle H H, which is called the D e 'clination-Semicircle, as representing th6Half of a Circle of Declination, or horaryCircle, and is divided into twice 90 0 , be*ing moved by the Handle K, which * scalled the Declination-Handle. It has also

a Nonfat