An addition vnto the vse of the instrument called the circles of proportion, for the working of nauticall questions
Subtitle: Together with certaine necessary considerations and advertisements touching navigation. All which, as also the former rules concerning this instrument are to bee wrought not onely instrumentally, but with the penne, by arithmeticke, and the canon of triangles. Hereunto is also annexed the excellent vse of two rulers for calculation. And is to follow after the 111 page of the first part
Publisher: Printed by Avgvstine Mathewes
Published: 1633
Place of publication: London
Language: eng
Number of pages: 74
Notes: This is the second part of the work pub. in 1632 with title: The circles of proportion and the horizontall instrument. Both invented, and the uses of both written in Latine, by Mr. W.O. Translated into English: and set forth for the publique benefit by Willaim Forster. cf. Cajori, Florian. William Oughtred. p. 35.

Running title: Of navigation.

"The declaration of the two rvlers for calculation" (referring to a slide-rule): p. 63-74.

Pollard, A.W. Short-title catalogue of books printed in England, Scotland, & Ireland and of English books printed abroad, 1475-1640 (2nd ed.) (STC), 18899c