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Type | Model No. | Maker | Country | Construction Material | Date | Scale Length | Area of Use |
Disk | Ross Rapid Computer | Louis Ross | "San Francisco, U.S.A." | Metal | 1918 | Dia. = 12.5 cm | General Calculations |
Notes: "1) Fourteen scales are provided for general engineering calculations. 2) See Vol 25, No 1 pg23-27 Journal of the Oughtred Society for a details about this slide rule."
Image 1
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Image 2
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Image 3
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Image 4
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