Thachers Patent Calculating Instrument or Cylindrical Slide Rule

Edwin Thacher

Published by Keuffel & Esser Co., 1903

About this Item

Keuffel & Esser Co.; New York, 1903. Trade paperback. Thachers Patent Calculating Instrument or Cylindrical Slide Rule is a detailed instructional manual explaining the design and use of Edwin Thachers innovative cylindrical slide rule, reprinted in 1903 by Keuffel and Esser Co. The booklet outlines how the instrument performs complex mathematical operations through its long folded logarithmic scales wrapped around a rotating cylinder, allowing highly accurate calculations without bulky straight rules. According to museum and archival descriptions, the manual teaches processes for multiplication and division, proportion, powers, and square and cube roots, and provides worked examples to guide engineers, surveyors, and technical students. The instrument itself, as described in scientific collections, uses twenty triangular brass rods and a sliding logarithmic cylinder to achieve extended precision in scientific and engineering work. This 1903 edition serves as both a practical guide and a historical record of one of the most advanced calculating devices of the pre-electronic era. An Acceptable, only partial front cover present, moderate handling/scuffing and age toning to covers, chips bottom rear cover corner, offsetting to title page (due to partial front cover), chip top and bottom title page corner, some age toning to pages, couple of tears top rear cover, smudge mark verso rear endpaper, ads in rear, few loose pages, an acceptable copy in wraps. 8vo[octavo or approx. 6 x 9], 71pp. We pack securely and ship daily w/delivery confirmation on every book. The picture on the listing page is of the actual book for sale. Additional Scan(s) are available for any item, please inquire.Please note: Oversized books/sets MAY require additional postage then what is quoted for 2.2lb book.

Seller Inventory # 111111114306

Bibliographic Details

• Title: Thachers Patent Calculating Instrument or Cylindrical Slide Rule
• Publisher: Keuffel & Esser Co.
• Publication Date: 1903
• Language: English
• Binding: Paperback
• Condition: Fair
• Seller catalogs:
  • Science & Technology