bubble level
Datelate 19th-early 20th Century
Inventory Number1998-1-1213
ClassificationLevel
Subject
Maker
American
?
Cultural Region
Dimensions2.3 × 26.3 × 2.4 cm (7/8 × 10 3/8 × 15/16 in.)
Material
DescriptionCylindrical brass tube with knurled ends, attached by two wedge-shaped brass legs to a rectangular brass base. The clear liquid within the tube is visible through a rectangular glass panel on its top side. The inside of the tube appears to have rusted, or is painted green.
Signedunsigned
Curatorial RemarksSimilar instrument appears in Casella 1871 catalog (Lib. 1401), see related works.
FunctionUsed to determine whether a flat surface is level.
American
Date: late 19th-early 20th Century
Object number: 2004-1-0025
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
W. & L. E. Gurley
Date: before 1882
Accessories: mahogany case; leather belt; six metal screws; tripod, see 5148
Object number: 5148
