Trigonometry: or The doctrine of triangles. First written in Latine, by Bartholomew Pitiscus, and now translated into English, by Ra: Handson. Whereunto is added (for the marriners vie) certaine nauticall questions, together with the finding of the variation of the compasse. All performed arithmetically, without mappe, sphaere, globe or astrolabe, by the said R.H.

Trigonometry: or The doctrine of triangles. First written in Latine, by Bartholomew Pitiscus, and now translated into English, by Ra: Handson. Whereunto is added (for the marriners vie) certaine nauticall questions, together with the finding of the variation of the compasse. All performed arithmetically, without mappe, sphaere, globe or astrolabe, by the said R.H.