Read on Mobile Enter Reading Mode Directions for using Thacher’s calculating instrument Posted on 5月 31st, 2015 by root Q Science publisher: New York, Keuffel & Esser co.creator: Thacher, Edwin, 1839- [from old catalog]Keyword: Slide-rule.years: 1910.pages: 74 p.class: QA73download: pdf file SCAN THIS QR CODE WITH YOUR PHONE
