The art of dialling : performed geometrically ... arthmetically ... instrumentally ... (1700)
Leybourn, William, 1626-1716 · London : T. Braddyll · leaf 79
Geometrical Dialling . 6y all parallel to the Line 12 (^12, and fo is your Dial finilhed. A DireU JEquino&ial Dial. … The Stile may be either a ftrait Pin, of the length of the line QJ>, let perpendicular to the Plain upon the point Qj the (hadow of the top thereof only giving the Hour. Or it may be a plate of the breadth of the diftance that is between the Hour-lines of 12 and 3, or 12 and 9. and then will the…
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