Wolfram Demonstrations Project

This Demonstration illustrates multiplication by two non-logarithmic slide rules.

In the first case, define

. Then

. This slide rule has the four scales

, and

In the second case, define

. Then

. This slide rule has the four scales:

, and

, but

and

can be considered the same.

When

, read

on the bottom scale below

on the

scale.

Reference

[1] J. Bryant and C. Sangwin, How Round Is Your Circle?, Princeton, NJ: Princeton University Press, 2008 pp. 247–248.

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Non-logarithmic Slide Rule