Norwood's system of navigation : teaching the whole art in a way more familiar, easie, and practical, than hath hitherto been done : shewing, the projection of the plain scale, the sphere in plaino, astronomical problems useful in navigation, traverse tables, right lin'd triangles, geometrically, by tables of sines, tangents, logarithms, and by Gunter's ruler, applied to plain and Mercator's sailing : illustrated by schemes on copper-plates ... : the description and use of a new instrument, called encyclologium, or the sliding circles, which, with ease, resolves all questions of proportion, trigonometry, arithmetick, square and cube root, gunnery, mensuration, and dyalling / - Norwood, Matthew. (Printed for H. Sawbridge, T. Wall, T. Guy, T. Parkhurst, J. Robinson, H. White, T. Malthus, and C. Conyers, 1685)