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Top 20 Directory:
Top : Science : Math : Education : Slide_Rules
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  		• About Slide Rules: Explains how to use the different scales to multiply and divide.
  		• Basic Slide Rule Instructions: Explains how to multiply, find cube and square roots and other operations. Includes illustrations.
  		• Edwin Thacher's 1881 Slide Rule Patent: Specification forming part of Letters Patent No. 249117, dated November 1, 1881. Includes diagrams.
  		• Eric's Introduction to the Slide Rule: Slide rule resources and links.
  		• History of the Slide Rule: Basic facts involving the development of the slide rule. Includes diagrams and links to information on various types of slide rules.
  		• How a Slide Rule Works: Short lesson.
  		• How To Make a Slide Rule (or Log-log or Semilog Graph Paper): Fairly simple instructions.
  		• How to Use a Slide Rule as a Bicycle Gear Chart: Slide rules are useful for doing gear calculations. Briefly describes a method for doing so.
  		• Instructions in Slide Rule Use: Basic information and a number of manuals in pdf format.
  		• Internet Slide Rule: Internet port of history's most heavily used advanced calculation aid.
  		• Make Your Own Circular Slide Rule: Templates, directions, and some links to other slide rule sites.
  		• Napier's Bones: A story about the use of a 6-inch Pickett "all-metal" slide rule (Model N 200-ES), with case.
  		• Slide Rule as a Teaching Tool: Examples of how the slide rule is a useful tool for teaching the mathematical concept of transformations. Examples and illustrations.
  		• Slide Rule Scales: Describes the types of scales found on most slide rules.
  		• The Scales of the Slide Rule: Various scales in a convenient tabular form. Includes mathematical formulation of the scales.
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