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Mathematica.

Cl. V. 243

res, Sectors, Quadrants, Planifpheres, and other thelike Inftruments yet in being, with eafe and exactness

& c. ib. 1674 in 4.

Art of Dialling, performed Geometrically by Scaleand Compaffes; Arithmetically by the Canons ofSines and Tangents: Inftrumentally by a TrigonalInftrument accommodated with lines for the purpo-fe; the Geometrical part whereof, is performed byprojecting of the Sphere in Plano, up on the plain itfelf, whereby not only the making buth the Reasonalfo of Dials is difcovered. ib. 166. in 4. The fecondEdition, corrected and enlarged with a fecond way ofGeometrical Dialling, very cafie, plain and univerfal.

ib. 1681 in 4.

An Introduction to Aftronomy and Geography.being a plain and eafie Treatife of the Globes,& c. ib.1675 in 8.

Novem Exercitia Geometrica, in ufum NautarumJuniornm& aliorum. Anglice. ib. 1667 in 4.Dialling: plain, concave, convex, projective, reflectiverefractive: shewing how to make all fuch Dials, andto adorn them with all ufeful Furniture relating tothe Courfe of the Sun: performed Arithmetically,Geometrically, Inftrumentally and Mechanically'sand illuftrated by Sculptures, engraver in Copper.Comprifed in eleven diftinet Tractates, the Contentswhereof, follow next after the preface to the Reader.Collected, methodized and published by W.Leybourn.

ibid. 1681.

The Art of Meafuring, containing the defcriptionand Explanation of thehed with variety of Scales, fitted for the more fpeedye Carpenters new Rule Furnis-Meafuration of Superficies and Solids, Alfo, certainGeometrical Problems, a table of Logarithms toIoooo, and fome ufes of the fame exemplified inArithmetick and Geomerry; but more particularly

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