Everard gauging slide rule
Datecirca 1815
Inventory NumberDW0966
ClassificationSlide Rule
Subject
Maker
Dring & Fage
1790-1940
Place of Origin
Dimensions2 x 30.5 x 2.9 cm (13/16 x 12 x 1 1/8 in.)
Material
Bibliography
DescriptionRectangular fruitwood rule with nearly square cross-section and four moveable slides (one on each face). Each slide is printed with two scales; the fixed portions of the rule above and below each moveable slide are each printed with one scale. Two small metal nails are visible at one end of each slide.
On the first side of the slide rule, the bottom edge of the top, fixed portion of the rule is printed with an unlabeled logarithmic scale carrying values from 1 to 3.2. Two points along this scale are marked with dots and labeled. Near the 1.7 mark is "W G"; near the 1.9 mark is "A G". Printed along the top and bottom edges of the moveable slide is a logarithmic "C" scale, with values ascending from 1 to 10. Along the top edge of the bottom, fixed portion of the rule is a logarithmic scale "D" carrying values from 3.2 to 10.
The second side of the slide rule is as follows: Printed along the bottom edge of the top, fixed portion of the rule is a scale for "Seg^t + L^y". This has values ranging from 0.3 to 4. Along both the top and bottom edges of the moveable slide is a logarithmic "C" scale, with values ranging from 1 to 9. Printed along the top edge of the bottom, fixed portion of the rule is a logarithmic scale "S+L" carrying values from 4 to 100.
Printed along the bottom edge of the top portion of the rule's third side is a logarithmic "A" scale, with values ranging from 1 to 10. Two points along this scale are marked with dots and labeled. Near the 2.2 mark is "M B"; near the 2.8 mark is "A". A logarithmic scale "B", with values ranging from 1 to 10, is printed along both the top and bottom edges of the center, moveable slide. A point on the top scale near the 2.3 mark is labeled "W". Along the top edge of the bottom, fixed portion of the rule is an inverted logarithmic scale "M+D", with values descending from 2 to 1, then from 10 to 3.
The top scale on the fourth side of the rule is "Seg^t + S^t", and is a logarithmic scale carrying values from 1 to 8. Printed along both top and bottom edges of the moveable slide is a logarithmic "B" scale with values ranging from 1 to 9. Printed along the top edge of the bottom, fixed portion of the rule is a logarithmic "S+S" scale, with values ascending from 8 to 100.
The reverse side of each of the moveable slides is printed with information needed to calculate excise duties.
On the first side of the slide rule, the bottom edge of the top, fixed portion of the rule is printed with an unlabeled logarithmic scale carrying values from 1 to 3.2. Two points along this scale are marked with dots and labeled. Near the 1.7 mark is "W G"; near the 1.9 mark is "A G". Printed along the top and bottom edges of the moveable slide is a logarithmic "C" scale, with values ascending from 1 to 10. Along the top edge of the bottom, fixed portion of the rule is a logarithmic scale "D" carrying values from 3.2 to 10.
The second side of the slide rule is as follows: Printed along the bottom edge of the top, fixed portion of the rule is a scale for "Seg^t + L^y". This has values ranging from 0.3 to 4. Along both the top and bottom edges of the moveable slide is a logarithmic "C" scale, with values ranging from 1 to 9. Printed along the top edge of the bottom, fixed portion of the rule is a logarithmic scale "S+L" carrying values from 4 to 100.
Printed along the bottom edge of the top portion of the rule's third side is a logarithmic "A" scale, with values ranging from 1 to 10. Two points along this scale are marked with dots and labeled. Near the 2.2 mark is "M B"; near the 2.8 mark is "A". A logarithmic scale "B", with values ranging from 1 to 10, is printed along both the top and bottom edges of the center, moveable slide. A point on the top scale near the 2.3 mark is labeled "W". Along the top edge of the bottom, fixed portion of the rule is an inverted logarithmic scale "M+D", with values descending from 2 to 1, then from 10 to 3.
The top scale on the fourth side of the rule is "Seg^t + S^t", and is a logarithmic scale carrying values from 1 to 8. Printed along both top and bottom edges of the moveable slide is a logarithmic "B" scale with values ranging from 1 to 9. Printed along the top edge of the bottom, fixed portion of the rule is a logarithmic "S+S" scale, with values ascending from 8 to 100.
The reverse side of each of the moveable slides is printed with information needed to calculate excise duties.
Signedstamped on wood below third side's moveable slide, center: DRING & FAGE MAKERS No 20 TOOLEY ST LONDON BRIDGE
Curatorial RemarksThe "B" slide is not finished to the same color as the rest of the slide rule; it may be a replacement for one lost or damaged.
According to this website (http://www.sliderules.info/collection/specialised/9945-d&f.htm), the wine gauge (W G) and ale gauge (A G) marks disappeared from Everard rules after the introduction in 1824 of the imperial gallon.
Dring and Fage were at 20 Tooley street from 1804-1844, see http://www.powerhousemuseum.com/collection/database/?irn=379301.
FunctionThis is an example of an Everard slide rule, invented by Thomas Everard in the late-seventeenth century and used by excise officers to the gauge the duty on ale, wine, and spirits. The "segment lying" ("Seg^t L^y") scale was used if the cask was on its side; the "segment standing" scale ("Seg^t S^t") was used if the cask was upright. The reverse sides of each slide carry information needed for computing duty.
The "B" slide is not finished to the same color as the rest of the slide rule; it may be a replacement for one lost or damaged.
The "B" slide is not finished to the same color as the rest of the slide rule; it may be a replacement for one lost or damaged.
ProvenanceDavid Wheatland purchased from Sotheby's, London, July 15, 1963 (part of lot 124), via Ernst Weil. Donated to CHSI 1985.
Keuffel & Esser Company
Date: patented 1933
Accessories: black leather case with flap closure
Object number: 1997-1-1925
Keuffel & Esser Company
Date: circa 1917
Accessories: rectangular black leather case
Object number: 1997-1-1631
Keuffel & Esser Company
Date: circa 1917
Accessories: Brown leather case with flap closure, for storage.
Object number: 1989-1-0012
Keuffel & Esser Company
Date: patented 1900
Accessories: brown leather case, for storage
Object number: 2003-1-0225
Pickett & Eckel, Inc.
Date: copyright 1959
Accessories: brown leather case with hard plastic lining and flap closure; small plastic bag; Twin Pack box; 3 instruction manuals (in file); belt loop (1991-4-0004b); pocket slide rule (1991-4-0004c); cardboard box
Object number: 1991-4-0004a
Keuffel & Esser Company
Date: circa 1936
Object number: 1997-1-1626
Pickett & Eckel, Inc.
Date: circa 1951
Accessories: brown leather case with table of equivalents
Object number: 2004-1-0341