Rare Books

The catholique planisphaer. Which Mr Blagrave calleth the mathematical jewel; : briefly and plainly discribed, in five books. The first shewing the making of the instrument. The rest shewing the manifold vse of it. 1. For representing several projections of the sphere. 2. For resolving all spherical triangles. 3. For resolving all problemes of the sphere; astronomical, astrological, and geographical. 4. For making all sorts of dials, both without doors and within; upon any walls, cielings, or floores, be they never so irregular, where-so-ever the direct or reflected beams of the sun may come. All which are to be done by this instrument, with wondrous ease and delight. A treatise very usefull for marriners, and for all ingenious men who love the arts mathematical