Patent Model for Simplex Slide Rule Clasp Invented by Rudolph C Smith. This ten-inch, linear one-sided slide rule has scales on the base labeled 3 and 2. On one side of the slide, scales are labeled 4 and 1. On the other side are scales labeled S and T and a scale of equal parts, which divides each inch into 50 increments.

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Size: 1940px × 1288px
Photo credit: © SBS Eclectic Images / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: division, mathematics, medicine, nmah, science