Gravet-Lenoir slide rule
Datecirca 1830
Inventory NumberDW0964
ClassificationSlide Rule
Subject
Cultural Region
Place of Origin
Dimensions1.9 lb. (0.9 kg)
entire: 1 x 51.1 x 3.1 cm (3/8 x 20 1/8 x 1 1/4 in.)
Overall - Storage: 2.2 x 53 x 6 cm (7/8 x 20 7/8 x 2 3/8 in.)
entire: 1 x 51.1 x 3.1 cm (3/8 x 20 1/8 x 1 1/4 in.)
Overall - Storage: 2.2 x 53 x 6 cm (7/8 x 20 7/8 x 2 3/8 in.)
Material
Accessorieswooden case with brass hinges and clasp
DescriptionRectangular boxwood rule with three slides. The top and bottom slides are fixed; the center slide, which is printed on both sides, moves to left and right.
Printed along the bottom edge of the top, fixed slide is a scale composed of two logarithmic scales (values 1 to 10) placed side by side. Printed along the top edge of the bottom, fixed slide is a logarithmic scale carrying values 1 to 10.
Three scales are printed on the face of the moveable slide. Along its top edge is a scale carrying values from 0.5 to 80. Along the center of the slide is a scale with values ranging from 0.5 to 45. Printed along the bottom edge of the slide is a scale with values descending from 1000 to 0.
Three scales are likewise printed on the back of the moveable slide. Along its top edge is a scale identical to that printed on the top fixed slide. Printed below this is a scale composed of two inverted logarithmic scales (values descending from 10 to 1) printed side by side. The scale along the bottom edge of the slide is identical to that printed on the bottom, fixed slide.
The slide rule is stored in wood case with brass hinges and clasp. Pasted to the inside of the box's lid and bottom are tables of measurements, coinage, conversion, etc. (in French).
Printed along the bottom edge of the top, fixed slide is a scale composed of two logarithmic scales (values 1 to 10) placed side by side. Printed along the top edge of the bottom, fixed slide is a logarithmic scale carrying values 1 to 10.
Three scales are printed on the face of the moveable slide. Along its top edge is a scale carrying values from 0.5 to 80. Along the center of the slide is a scale with values ranging from 0.5 to 45. Printed along the bottom edge of the slide is a scale with values descending from 1000 to 0.
Three scales are likewise printed on the back of the moveable slide. Along its top edge is a scale identical to that printed on the top fixed slide. Printed below this is a scale composed of two inverted logarithmic scales (values descending from 10 to 1) printed side by side. The scale along the bottom edge of the slide is identical to that printed on the bottom, fixed slide.
The slide rule is stored in wood case with brass hinges and clasp. Pasted to the inside of the box's lid and bottom are tables of measurements, coinage, conversion, etc. (in French).
Signedface, top slide, top center: GRAVET LENOIR
FunctionFor solving mathematics problems, including multiplication, division, proportions, squares, square roots, and trigonometric problems.
ProvenanceDavid Wheatland purchased from Alain Brieux, Paris, April 19, 1962 (lot 5/9).
Ledder & Probst
Date: circa 1915
Object number: 1997-1-1633
Hemmi
Date: 1971
Accessories: brown leather case with glap closure; brown leather loop for attachment to belt
Object number: 1989-1-0009
Keuffel & Esser Company
Date: copyright 1947
Accessories: brown leather case, with metal-reinforced belt clip
Object number: 1997-1-0971
Eugene Dietzgen Company
Date: 1941-1952
Accessories: black leather case with flap closure
Object number: 2007-1-0142
Pickett & Eckel, Inc.
Date: after 1964
Accessories: brown leather case with belt clip
Object number: 1991-4-0004c
Eugene Dietzgen Company
Date: early 20th-mid 20th Century
Accessories: brown leather case with flap closure and model information printed in gold
Object number: 2003-1-0223
Hemmi
Date: circa 1951
Accessories: Black leatherette case, for storage.
Object number: 2003-1-0226
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: dated 1943
Accessories: instruction book and black leather case with flap closure, for storage
Object number: 1990-5-0004
Keuffel & Esser Company
Date: circa 1943
Accessories: black leather case with flap closure
Object number: 1995-1-0023