Blind Alley---Australian lawn bowlers Bill Turnbull, left, and Terry Osborn scan their bowling balls with an electronic device developed on sonar principle. Ultrasonic eyesight aid was developed in Britain in 1966.

Digital Commonwealth — Boston Public Library

Blind Alley---Australian lawn bowlers Bill Turnbull, left, and Terry Osborn scan their bowling balls with an electronic device developed on sonar principle. Ultrasonic eyesight aid was developed in Britain in 1966.

[ca. September 1970]

RightsCC0 — Public Domain

CollectionDigital Commonwealth — Boston Public Library

[Information from item housing] Sports: Bowling: Misc. Photos

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