brass engineer's level
Datecirca 1800
Inventory NumberDW0365
ClassificationLevel (Engineer's)
Subject
Maker
American
?
Cultural Region
Dimensions2.3 × 13 × 1.8 cm (7/8 × 5 1/8 × 11/16 in.)
Material
DescriptionBrass tube with one small screw near each end, and rectangular attachments at each end. Three larger screws in each of the rectangular attachments fix the tube into a rectangular brass case. The clear liquid inside the tube is visible through an elliptical glass panel in its top.
Signedunsigned
FunctionUsed to determine whether a flat surface is level.
ProvenanceDavid Wheatland purchased from Sotheby's, London, June 25, 1968 (lot 48). Donated to CHSI 1985.
Keuffel & Esser Company
Date: circa 1954
Accessories: mahogany case
Object number: 1997-1-1997
Panelvision Corporation
Date: 1984
Accessories: single-board display controller
cable for display (1997-1-0686c)
shipping ticket/ hand carry pass dated June 11, 1997 (in instrument file)
letter to Dr. Richard V. Kollarits from William Andrewes dated June 16, 1997 regarding donation of MiniGraphic display and letter to William Andrewes from Dr. Richard V. Kollarits that accompanied the object upon donation on June 11, 1997 (in instrument file)
four sample color prints made with this display on micro-encapsulated photographic paper. 1. man in business suit, 2. woman crouching next to lawn ornament, 3. two clowns painting a third's face, 4. woman in winter hat and scarf (in instrument file)
copies of two articles by AT&T Bell Laboratories staff (Richard V. Kollarits, William, H. Ninke, David C. Gibbon) on color imaging and printing (in instrument file)
Panelvision pamphlet introducing the MiniGraphic multipurpose flat panel display, including instrument specifications, consumer prices, functioning and features (in instrument file)
1984 article by Panelvision employees (Peter Brody Fang-Chen Luo, Paul Malmberg) on active matrix technology (in instrument file)
Panelvision Corporation Fact Sheet, including details of company history and recent developments (in instrument file)
article about commercial debut of active matrix technology from Design Engineering newspaper, June 18, 1984 (in instrument file)
full circuit diagram and schematic for MiniGraphic Display Controller (in instrument file)
instruction manual and description of MiniGraphic Display Controller (two copies, in instrument file)
circuit diagrams and instruction manuals for the MiniGraphic Display (two booklets, in instrument file)
Object number: 1997-1-0686a
Darling, Brown, and Sharpe
Date: circa 1890
Accessories: fitted, triangular leather holder
Object number: DW0467
Elliott Brothers
Date: circa 1860
Accessories: original mahogany storage case
trade card from William D. Hocker, Inc
two original curatorial cards
Object number: DW0518
Adrien Gavard
Date: circa 1860
Accessories: hinged mahogany case with original trade label; extra arm; writing implements; instrument weights; small ivory wheels with brass frames
Object number: 1997-1-1856
Forster
Date: 1950-1960
Accessories: spare ink cartridges; pen attachments
am auxiliary box containing small Allen wrench, scotch tape, extra parts, and storage instructions
Object number: 1999-1-0054
