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Joseph Booth, “On an Improved Instrument for Drawing Spirals,” British Association for the Advancement of Science Report of the Annual Meeting [for 1860] , 30, 1861, pp. 60-61. London International ...

Whether you’re an artist, an architect, or carpenter, a T-square is an essential tool for your work arsenal. Like an upgraded straightedge, this drawing instrument helps you draw accurate, properly ...

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. This instrument supplies a grid of ...

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