Scientific Instrument Society 25th Anniversary Exhibition
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31 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