overall: 11 cm x 19 cm x .2 cm; 4 11/32 in x 7 15/32 in x 3/32 in
Object Name:
triangle
Date made:
late 19th century
Description:
This 7-1/2" 30°-60°-90° triangle has a beveled hypotenuse and a 9/16" round hole at the center for positioning and holding the instrument. Compare to 304826.137 and 335331. See also 1983.0238.01 and 1979.0876.01. The triangle was found in the Physical Sciences collections in 1979 with objects that suggest an association with Cleveland Abbe (1838–1916), an American engineer, astronomer, and meteorologist who worked for the U.S. Weather Service from 1871 until shortly before his death.
