Mathematical tools
Pascal's calculator paris
History of the Slide Rule
Slide Rule
More printable protractors for both angle and spread measurement protractor
Print a Protractor
Printable protractors for download protractors
Printable Protractors
A Digital Slide Rule -- A Flash demo of circular slide rule.
A Digital Slide Rule
Concise Online Shop -- one of the few current manufacturers of circular slide rules. Based in Japan.
Circular Slide Rule (Introduction)
Clark McCoy -- extensive information about K&E slide rules: catalogs, scanned manuals, and historical information about the various models
K&E Catalogs Main Page
prices of slide rules -- a statistical analysis of prices at which various models of slide rules have been sold on ebay
Prices of popular models of slide rules
Eric's Slide Rule Site -- information on buying slide rules, cleaning them, and other topics
Eric's Slide Rule Site
Oughtred Society Web Page dedicated to preservation and history of slide rules
Oughtred Society Slide Rule Home Page.
Sag Milling's Online Sliderule fully functional online version of a slide ruler.
SAGMILLING.COM - The Internet's only comminution resource
Breitling Navitimer info webpage – Wristwatch with circular rule
Pickett Slide Rules sphere test
Sphere's Pickett Slide Rule / Company Archive - Slide Rules on-line!
How a slide rule works sphere test
Sphere Research's Slide Rule Universe - How and Why a Slide Rule Works
The Slide Rule Universe – A comprehensive slide rule reference and buying/selling site
Like slide rules? Welcome to Sphere Research's Slide Rule Universe, literally everything about slide rules, sliderules and sliderulers!
''Make your own'' circular ''slide rule'' solar physics montana math
Circular Slide Rule
ASA E-6B Metal Flight Computer – Metal model of the E-6B
ase6bmetflig
ASA Micro E-6B Flight Computer – A specialized circular slide rule
ASA Micro E-6B Flight Computer at Ace's Pilot Shop Aviation Pilot Supplies
''Make your own slide rule'' ( PDF file)
Sliderule information at the Museum of HP Calculators
Slide Rules
Leibniz's "Stepped Reckoner"
Leibniz's Stepped Reckoner
Gottfried von Leibniz's Step Reckoner
Gottfried von Leibniz's Step Reckoner
Making Accurate Straight-Edges from Scratch home cast machines
Making Accurate Straight-Edges from Scratch
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