Accession No

0442

Brief Description

gauging slide rule, Everard’s pattern, English, 18th C

Origin

England

Maker

Class

calculating

Earliest Date

1700

Latest Date

1800

Inscription Date

Material

wood (boxwood); metal (brass)

Dimensions

length 320mm; breadth 31mm; thickness 19mm

Special Collection

Robert Whipple collection

Provenance

Purchased from T.H. Court in 05/1927.

Inscription

Description Notes

Boxwood slide rule with inlet brass gauging points.
Face A: upper part of stock has double radius log scale marked ‘A’, divided 1 - 10[0], numbered 1, 2...1[0], 2[0]...10[0]; guaging points marked ‘MB’, ‘A’ (twice). Slide carries double radius log scale marked ‘B’, identical to the previous one. Lower part of stock carries inverted double radius log scale marked ‘MD’ (with two fleurs-de-lys), divided [2.15] - [215], numbered 3, 4...1[0], 2[0]...10[0], 2[00]. Reverse of slide has scale for conversion between inches of barrel diameter and gallons in one inch depth; inch scale divided [12.5] - [24.5], numbered by 1, subdivided to 0.1; gallon scale divided [0.46] - [1.7], numbered by 0.1, subdivided to 0.02.
Face B: upper part of stock has single radius log scale marked ‘D’, divided 1 - 10, numbered by 1; gauging points marked ‘WG’, ‘AG’, ‘MS’ and ‘MR’. Slide carries double radius log scale marked ‘C’, divided 1 - 10[0], numbered 1, 2...1[0], 2[0]...10[0]. Lower part of stock carries two scales: first is double radius log scale marked ‘Seg Ly’, divided [0.2] - 100, numbered 1, 2...10, 20...100; second is double radius log scale marked ‘Seg St’, divided [0.8] - 100, numbered 1, 2...10, 20...100. Reverse of slide has scale for conversion between inches of barrel diameter and gallons in one inch depth; inch scale divided [24] - 36, numbered by 1, subdivided to 0.1; gallon scale divided [1.6] - 3.6, numbered by 0.1, subdivided to 0.02.
Edge A: inch scale divided [0] - 12, numbered by 1, subdivided to 0.1. Scale marked ‘Spheroid’, divided [0] - [7.5], numbered by 1, subdivided to 0.1. Scale marked ‘2d variety’, divided [0] - [6.5], numbered by 1, subdivided to 0.1. Scale marked ‘3d variety’, divided [0] - [5.5], numbered by 1, subdivided to 0.1.
Edge B: decimal foot scale, marked ‘FM’, divided [0] - 100, numbered by 10, subdivided to 1. Inch scale marked ‘IM’, divided [0] - 12, numbered by 1, subdivided to 0.1. Third scale marked ‘FC’ (frustrum of a cone), divided [0] - 6, numbered by 1, subdivided to 0.1 (this is the fourth variety of cask shape).

Condition fair (slight warping and slides very tight); complete.

References

Events