![Hints for the improvement of trusses; intended to render their use less inconvenient, and to prevent the necessity of an understrap. With the description of a truss of easy construction and slight expence [sic], for the use of labouring poor / [James Parkinson].](https://images.rawpixel.com/image_200/cHJpdmF0ZS9zdGF0aWMvZmlsZXMvd2Vic2l0ZS8yMDI0LTAyL3djYjNoMmNqY2YtaW1hZ2UuanBn.jpg)
https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/13974453
Hints for the improvement of trusses; intended to render their use less inconvenient, and to prevent the necessity of an understrap. With the description of a truss of easy construction and slight expence [sic], for the use of labouring poor / [James Parkinson].
Hints for the improvement of trusses; intended to render their use less inconvenient, and to prevent the necessity of an understrap. With the description of a truss of easy construction and slight expence [sic], for the use of labouring poor / [James Parkinson].
Original public domain image from Wellcome Collection
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