[Sundial] [architectural drawings]
A manuscript sundial treatise of 1750, attributed to Bern Dibner's collection and held by the Smithsonian Libraries, presenting dial constructions for designers and students of timekeeping. The two hand-ruled pages show geometric layouts with compass arcs, straight construction lines, and labelled lettered diagrams in ink and wash, offering a designer clean, precise reference for radial grids, arc-based linework, and technical plan annotation.
![Picture 1 of 2 from [Sundial] [architectural drawings] (1750), leaf 1](https://img.insideoutlibrary.com/img/200/ia-sundial00dibn-1-0.webp)
![Picture 2 of 2 from [Sundial] [architectural drawings] (1750), leaf 2](https://img.insideoutlibrary.com/img/200/ia-sundial00dibn-2-0.webp)