L. Lumley & Co. Gauger's Slide Rule

Description:

This yew rule has straight brass ends and two slides, which fit between the three parts of the base. On one side, the top scale on the base (labeled A), the two scales on the upper slide (labeled E), the first scale in the middle of the base (labeled D), and the two scales on the second scale (labeled B and C) are identical logarithmic scales that run from 1 to 10 twice in the length of the rule. The second scale in the middle runs from 1 to 100 and is labeled SEGT ST (segments standing). The lowest scale on the base is labeled SEGT LY (segments lying).

These scales are used with the slides to find the volume of the liquid in a cask that is not full, either when it is standing on its base or lying horizontally. The ImB and ImG points, for just over 2200 cubic inches in an imperial bushel and 277.42 cubic inches in an imperial gallon, are marked on the A scale. On the D scale, point 18.95 is marked IG for the diameter of a cylinder containing one imperial gallon; point 46.3 is marked MS, for the side of a square vessel that contains one solid bushel per inch of depth; and point 52.32 is marked MR, for the side of a square vessel that contains one malt bushel per inch of depth.

The reverse side of the rule has a scale on the base labeled A that runs logarithmically from 1 to 10. Both slides have identical scales (the one on the upper slide is labeled C) that run from over 80 (UNDER PROOF) down to 0 (PROOF) and then up to 70 (OVER PROOF). The middle of the base has a scale labeled B that runs logarithmically from 4 to 40 and a scale labeled C that runs logarithmically from 300 to 30. The bottom of the base has a scale, also labeled C, that runs logarithmically from 100 to 10. There is no indicator.

One edge of the instrument has a scale labeled SPHD and a scale labeled 2ND VARIETY. These scales are for determining the diameters of two different shapes of barrels. The other edge is marked: L. LUMLEY & CO LTD 1 AMERICA SQUARE LONDON. L. Lumley & Company, a distributor of packing cases and related materials for bottling, was in business in London from at least 1884 though 1929.

For slide rules with similar two-slide designs but different purposes, see MA.318478 and 1987.0693.01. For earlier gauger's rules, see MA.319510 and 1980.0588.04.

Reference: Ronald E. Manley, "Gauging," http://www.sliderules.info/a-to-z/gauging.htm.

Date Made: 1884-1929

Maker: L. Lumley & Company Limited

Location: Currently not on view

Place Made: United Kingdom: England, London

Subject: Rule, CalculatingTaxesMathematics

Subject:

See more items in: Medicine and Science: Mathematics, Science & Mathematics, Slide Rules

Exhibition:

Exhibition Location:

Data Source: National Museum of American History

Id Number: MA.320637Catalog Number: 320637Accession Number: 242721

Object Name: slide rule

Physical Description: yew (overall material)brass (part material)Measurements: overall: .9 cm x 32.5 cm x 5.5 cm; 11/32 in x 12 25/32 in x 2 5/32 in

Guid: http://n2t.net/ark:/65665/ng49ca746a9-aa8f-704b-e053-15f76fa0b4fa

Record Id: nmah_1215044

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