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Educational contact goniometer with fixed limbs



Mohave, Hollywood
Contact goniometer (colorless clear plastic 20.3 x 10.2 cm) in card envelope (21.7 x 11.4 cm) .
Signed "MOHAVE SALES INC.| HOLLYWOOD 27 | U.S.A. | EVERYTHING FOR ENGINEERS AND GEOLOGISTS | 77 - CONTACT GONIOMETER (AFTER PENFIELD)"
Fist half 20th century.

Collection: private collection

Educational contact goniometer with fixed limbs, Mohave, Hollywood