Albree Trulog Spiral Circular Logarithmic Table

Albree Trulog Spiral Circular Logarithmic Table

Usage conditions apply
This is Norman Albree's pilot model for a one-sided logarithmic chart. It is white paper on a wooden disc painted black. There is a clear celluloid indicator that pivots at the center and is cushioned on purple felt. The scale permits readings of logarithms from 10,000 to 100,000. The instrument is marked at the center: ALBREE TRULOG SPIRAL (/) G. NORMAN ALBREE (/) BOSTON. Inside the fifth ring of the spiral is marked: ©1945.
George Norman Albree (1888–1986), the inventor and donor, attended Amherst College with the Class of 1911 and graduated from Dartmouth in 1912. He is best known for designing the first monoplanes purchased by the U.S. Army in 1917. However, after testing, the military deemed the aircraft too unreliable and slow and declined to order a production run from Albree's employer, the Pigeon Hollow Spar Company of East Boston, Mass.
See also 335484 and 335487.
Currently not on view
Object Name
slide rule
date made
after 1945
Albree, G. Norman
place made
United States: Massachusetts, Boston
Physical Description
paper (part material)
plastic (cursor material)
wood (overall material)
overall: 2 cm x 20.5 cm x 20.5 cm; 25/32 in x 8 1/16 in x 8 1/16 in
ID Number
catalog number
accession number
Credit Line
Gift of G. Norman Albree
Rule, Calculating
Chart, Logarithmic
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Slide Rules
Data Source
National Museum of American History
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