Educational contact goniometer with fixed arms

 

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

private collection

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

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