Optical Tooling and Optical Alignment. Equipment , Antique Surveying Equipment, LLC. Antique Surveying Equipment ,LLC. 4029 - Berger tunnel transit. Click on the photo for larger image. This web site is dedicated to the buying and. Selling of various new and. Antique surveying instruments, and optical tooling. Stock a large inventory of old er. By several of the makers. Instruments and Equipment for Sale.

A Collection of Antique Mathematical Instruments and Engineering Tools.

, 8 Albert Square, Manchester. Links to many other catalogues are listed on the website of the Scientific Instrument Commission.

Site francophone sur les règles à calcul et divers instruments mathématiques manuels. Les KITS de Cesare BAJ. Les règles qui ont du ressort. Les règles de Madame IRMA.

Click on images for more information. The Oughtred Society was founded in 1991 by a group of slide rule collectors and is dedicated to the preservation and history of slide rules and other calculating instruments. In the past 27 years it has evolved to an international organization with members in 20 countries. It is noted for its highly acclaimed Journal of the Oughtred Society,. Many rare and unusual slide rules to be auctioned. Oughtred Society Annual Meeting - April 21, 2018. The Oughtred Society is .

Prehistoria de la Informatica Office Collectibles. LA PREHISTORIA DE LA INFORMATICA. Aunque parece ser que no fue la primera máquina calculadora, corresponde a. Que se sigue usando hasta nuestros días. Un nuevo paso fue dado en 1709 por. En la que los cálculos mecánicos se realizan en virtud del movimiento de caída de un peso, limitándose el operador a introducir los datos y anotar el resultado.

Long time collector and researcher of slide rules David A. Davis blogs about all things slide rule. And maybe some other stuff. Tuesday, June 21, 2011. Hello and welcome to my blog site about slide rules. This represents the newest incarnation of my slide rule sites, the earliest of which was online in 1998! David A.

The Slide Rule Trading Company specializes in slide rule replacement parts. We also buy and sell new and used slide rules and almost everything that is of interest to slide rule collectors. Prices are up to date but availability changes from week to week. The Slide Rule Trading Co. has the most extensive selection of slide rule repair parts available on the Internet. Books, Literature, Ephemera.