Mr. De Sargves universal way of dyaling. Or, plain and easie directions for placing the axeltree, and marking the hours in sun-dyals, after the French, Italian, Babylonian and Jewish manner. Together with the manner of drawing the lines of the signs, of finding out the height of the sun abouve the horizon, and the east rising of the same, the elevation of the pole, and the position of the meridian. All which may be done in any superficies whatsoever, and in what situation soever it be, without a

by Gérard Desargues