Educational contact goniometer with fixed limbs

 

S.L. Penfield, New Haven, Conn., U.S.A.
Contact goniometer (cardboard 15 x 7.7 cm) with fixed celluloid limbs, with instruction leaflet (12 x 20.2 cm) in stiff paper envelope (16 x 8.7 cm).
Signed "CONTACT GONIOMETER | MODEL B. | Designed by | S.L. Penfield | Professor in Yale University | Made in New Haven, Conn., U.S.A. | Pat. July 31, 1900."

private collection

Educational contact goniometer with fixed limbs, S.L. Penfield, New Haven, Conn., U.S.A.

Educational contact goniometer with fixed limbs, S.L. Penfield, New Haven, Conn., U.S.A.

Educational contact goniometer with fixed limbs, S.L. Penfield, New Haven, Conn., U.S.A.

Educational contact goniometer with fixed limbs, S.L. Penfield, New Haven, Conn., U.S.A.
 
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