A short treatise of dialling shewing, the making of all sorts of sun-dials, horizontal, erect, direct, declining, inclining, reclining; vpon any flat or plaine superficies, howsoeuer placed, with ruler and compasse onely, without any arithmeticall calculation. By Edvvard Wright.

CAP. III. The second diuision of Dials into direct and declining. (Book 3)

ALl flats are either direct, or declining.

2 All flats lying leuel with the Hori∣zon are direct.

3 But if the flat lie not leuel with the Horizon: you shall thus know whether it be direct or declining. First, draw therein a line parallel to the Horizon, after this manner: holde the Clina∣tory to the flat in such sort, that the plumbline may fall vpon one of the sides of the quadrant; then draw a line by the nether side of the Clinatory in recliners; or by the vpper side in incliners, or by either of those sides in erect flats, for that line shall be parallel or aequidistant to the Horizon, and may

be called the Horizontall line. Set the North side of the Cliniatorie to this liue, if the North end of the needle looke towards the flat: then if the Mag∣netical Meridian be right vnder the needle, it is a di∣rect flat: but if it differ from it, it is declining, and that so much as that difference is, and that way which the North end of the needle declineth from the Northend of the Meridian line in the clinatory.

4 If the Southend of the needle looke towards the flat, made your account contrary wise.