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31 Slide Rule in a Drawing Scale

image of Slide Rule in a Drawing Scale

Drawing scales are very common. They come in various sizes and in different materials such as ivory, boxwood or cardboard . They are graduated with scales of equal parts and are used for transferring measurements, generally on a reduced scale, to a plan or drawing.

In this possibly unique, nine-inch, example, a slide rule has been let into the reverse.
The A, B and C lines are of double radius while the D line is of single radius. It is signed ‘J. CASARTELLI, MANCHESTER’, this was Joseph Louis Casartelli (fl.1849-1895) who worked in Manchester from 1851.

A boxed set can be seen in the ‘Drawing Instruments’ case in the Upper Gallery.

English ca. 1870.

Collection: Peter Delehar, London

Objects lent by Peter Delehar, London:

08. Circular Slide Rule on a Snuff Box, by Hoyau, Paris, 1816

11. Reversible Circular Slide Rule, English, c.1840

25. Slide Rules - a Selection of the Original Pocket Calculators

26. Javal's Ophthalmic Slide Rule, by A. Cretes, Paris, c. 1875

27. Triangular Slide Rule with Four Sliders, by Elliott, London, c. 1870

28. Oil Calculation Slide Rule Designed by Forrest M. Towl, New York, c. 1889

29. Master Rule and Gauging Slide Rule, by Dring & Fage, London, 19th Century

30. Anderson Celluloid Gridiron Slide Rule, by Casella & Co, London, c. 1903

32. Circular Slide Rule, by Joseph Lamb, London, c. 1827

33. Roubicek Circular Slide Rule for Surveying, by Neuhöfer & Sohn, Vienna, c. 1870

34. Annular Slide Rule, by Elliott Brothers, London, c. 1875

36. Box Sextant with Integral Slide Rule, by Troughton & Simms, London, c. 1870

41. 2ft Gunter Rule, owned by Thomas Annand, English, 1683

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