This book represents an authentic reproduction of the text as printed by the original publisher. While we have attempted to accurately maintain the integrity of the original work, there are sometimes problems with the original work or the micro-film from which the books were digitized. This can result in errors in reproduction. Possible imperfections include missing and blurred pages, poor pictures, markings and other reproduction issues beyond our control. Because this work is culturally important, we have made it available as part of our commitment to protecting, preserving and promoting the world's literature. ++++The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to insure edition identification: ++++"The circles of proportion and the horizontal instrument The former shewing the maner how to work proportions both simple and compound: and the ready and easy resolving of quaestions both in arithmetic, geometrie"Addition unto the use of the circles of proportion.Oughtred, William, 1575-1660.Forster, William, mathematician.W.O. = William Oughtred.Another issue, with cancel letterpress title page, of STC 18899: The circle of proportion, and the horizontall instrument.Translated by William Forster from the original Latin.The "additament" also published separately as STC 18899c: An addition unto the use of the circles of proportion.[8], 152, [8] p., [2] leaves of plates: London: Printed by Augustine Mathewes, and are to bee sold by Nic: Bourne at the Royall Exchange, 1633.STC (2nd ed.) / 18899bEnglishReproduction of the original in the Bodleian Library++++This book represents an authentic reproduction of the text as printed by the original publisher. While we have attempted to accurately maintain the integrity of the original work, there are sometimes problems with the original work or the micro-film from which the books were digitized. This can result in errors in reproduction. Possible imperfections include missing and blurred pages, poor pictures, markings and other reproduction issues beyond our control. Because this work is culturally important, we have made it available as part of our commitment to protecting, preserving and promoting the world's literature.