A perfect and easie treatise of the vse of the clestiall globe written aswell for an introduction of such as bee yet vnskilfull in the studie of astronomie: as the practise of our countriemen, which bee exercised in the art of nauigaiton. Compiled by Charles Turnbull: and set out with as much plainnes as the author could: to the end it might of euery man be vnderstood