Geometrical dyalling: or, dyalling performed by a line of chords onely, or by the plain scale. Wherein is contained two several methods of inscribing the hour-lines in all plains, with the substile, stile and meridian, in their proper coasts and quantities; being a full explication and demonstration of divers difficulties in the works of learned Mr. Samuel Foster deceased, late professor of astronomy in Gresham Colledge,; [sic] also a collection of divers things from the works of Clavius and others. Whereto is added four new methods of calculation, for finding th requisites in all leaning plains, with full directions suited to each method for placing them in thier proper coasts, without the help of any delineations. Also how by projecting the sphere, to measure off all the arks found by calculation, and to determine what hours are proper to all kinde of plains, omitting superfluity. Lastly, the making of dyals from three shadows of a gnomon placed in a wall at random, with a method of

People / Organizations

• John Collins (Author)

Imprint

London: printed by Thomas Johnson for Francis Cossinet, and are to be sold at his shop at the Anchor and Mariner in Tower-street, at the end of Minting-lane, with other mathematical books; also to be sold by Henry Sutton mathematical instrument-maker, living in Threed-needle street behinde the Exchange, 1659.

Publication year

1659-1659

ESTC No.

R17003

Grub Street ID

64826

Description

[6], 56, 59-82 p., [20] leaves of plates : ill. ; 4⁰