log chip (replica)
Datelate 20th Century
Inventory Number1999-1-0093
ClassificationLog
Subject
Maker
American
?
Cultural Region
Dimensions2 × 37 × 16 cm (13/16 × 14 9/16 × 6 5/16 in.)
Material
DescriptionQuadrant-shaped unfinished oak chip with rope attached at three corners.
Replica of a c.1800 device.
For an image of an oak log chip, along with wooden rope spool, see The Peabody Museum Collection of Navigating Instruments, plate XLI. The description on p. 83 reads "Log chip, line and reel. Quadrant-shaped oak chip 4 1/2" radius, 3/8" thick. Reel 12 1/2" long, diameter of end disc 6", turned handle 4 1/2" long. Line 1/8" cod line."
Replica of a c.1800 device.
For an image of an oak log chip, along with wooden rope spool, see The Peabody Museum Collection of Navigating Instruments, plate XLI. The description on p. 83 reads "Log chip, line and reel. Quadrant-shaped oak chip 4 1/2" radius, 3/8" thick. Reel 12 1/2" long, diameter of end disc 6", turned handle 4 1/2" long. Line 1/8" cod line."
Signedunsigned
FunctionUsed to measure speed of a ship while on board. Users would throw the wooden chip behind the ship and it would remain in place while rope from a reel was allowed to unwind for a fixed period of time. The speed would be determined by the length of rope that unwound in that time interval.
For more detailed construction and use, see the wikipedia page.
For more detailed construction and use, see the wikipedia page.
Richard L. Ketchen
Date: 1997
Accessories: grey plastic case; ten spare brass screws; spare log chip
Object number: 1997-1-0632
International Business Machines Corporation
Date: 1982
Object number: 2001-1-0025
International Business Machines Corporation
Date: 1981-1985
Accessories: clear plastic case; hand-written letter from Owen Gingerich to William Andrewes about donating chip to Collection, received May 21, 1998 (in instrument file); printed email from William Andrewes to Owen Gingerich, thanking him for the chip donation, dated June 1, 1998 (in instrument file)
Object number: 1998-1-0880
Keuffel & Esser Company
Date: copyright 1947
Accessories: brown leather case, with metal-reinforced belt clip
Object number: 1997-1-0971
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
Blue Hill Meteorological Observatory
Date: 1943-1958
Object number: 1998-1-0602
Pickett & Eckel, Inc.
Date: after 1964
Accessories: brown leather case with belt clip
Object number: 1991-4-0004c
Hemmi
Date: 1971
Accessories: brown leather case with glap closure; brown leather loop for attachment to belt
Object number: 1989-1-0009
Intel Corporation
Date: circa 1985
Object number: 1998-1-0575
Digital Equipment Corporation
Date: 1960-1970
Accessories: circuit board, "flip chip" cards (10)
Object number: 1998-1-0230