GoniometerType

Ward's Natural Science Establishment, Inc. Rochester, N.Y.
Contact goniometer (plastic 10.8 x 6.4 cm) with an instruction leaflet (12.6 x 15.3 cm) in transparent plastic envelope (14 x 8.6 cm) .
Signed "WARD'S | CONTACT GONIOMETER | WARD'S NATURAL SCIENCE ESTAB., Inc. | Rochester, N.Y. Monterey, Calif. | Cat # 13W0561 Made in U.S.A."

private collection