Educational contact goniometer with fixed limbs

 

Geology Lab Kits, Canyon, Texas
Contact goniometer (cardboard 12.6 x 7.6 cm) with fixed limbs.
Signed "GONIOMETER | GEOLOGY LAB KITS. | 1903 Third Avenue | CANYON, TEXAS". First half 20th century.

private collection

Educational contact goniometer with fixed limbs, Geology Lab Kits, Canyon, Texas

Educational contact goniometer with fixed limbs, Geology Lab Kits, Canyon, Texas