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The description and uses of a new contriv'd eliptical double dial; as also of the universal æquinoctial dial
Which serve to find the latitude, hour of the day, the true meridian, the altitude, azimuth, and declination of the sun; his place in the ecliptick, the time of his rising and setting, length of day and night, &c. With a scheme of each dial curiously engraven. Very useful for all seamen and travellers, and our curious gentry to set, examine, and adjust their pendulums. Whereunto is added a correct table of the latitude of the most eminent cities and towns in Europe; as also a table of equation. By Tho. Tuttell mathematical instument-maker at the Kings-Arms and Globe at Charing-Cross -
A new and easie method to the art of dyalling
containing, first, all horizontal dyals, all upright dyals, reflecting dyals, dyals without centres, nocturnal dyals, upright declining dyals, without knowing the declination of the plane : secondly, the most natural and easie way of describing the curve-lines of the suns declination of any plane : to which is added, an arithmetical treatise of the combinations, elections, permutations and composition of quantities, illustrated by several examples, with a new speculation of the differences of the powers of numbers