The geometrical key
Subtitle: or, The gate of equations unlock'd : a new discovery of the construction of all equations, howsoever affected, not exceeding the fourth degree, viz., of linears, quadratics, cubics, biquadratics; and the finding of all their roots, as well false, as true, without the use of mesolabe, trisection of angles, without reduction, depression, or any other previous preparation of equations, by a circle, and any (and that but one only) parabole : and this, by one only general rule, than which a more simple, more perfect, more general, more easie to be understood, or more fit for practice, cannot be devised or wished for : fortified with demonstrations, illustrated with figures, to each equation, and exemplified with numeral equations, (according to all the varieties of cases,) adapted to each figure : for the use of young mathematicians, a work hitherto desired
By: by Tho. Baker
Contributors: Playford, John, 1623-1686?; Borghese, Marcantonio, principe, 1814-1886
Publisher: Printed by J. Playford for R. Clavel, at the Peacock in S. Paul's Church-yard
Published: 1684
Place of publication: London
Language: eng
Number of pages: 167
Subjects: Bibliography; Algebra; Early works to 1800; Graphic methods; Parabola; Biquadratic Equations
Other titles: Gate of equations unlock'd; Clavis geometrica catholica
Notes: Added title page in Latin: Clavis Geometrica Catholica: sive Janua Aequationum reserata: ...

English and Latin on opposite pages, which are numbered in duplicate.

Advertisements: [3] p. at end.

Title pages enclosed within double line rule borders.

Text enclosed within single line rule border.

Rare Book copy: Laced limp paper binding. With armorial bookplate: Ex libris M.A. principis Bvrghesii.

Wing B517

Arber, E. Term catalogues, II, 73

English short title catalogue, R2991