: Architectural Ms. drawing, . 18th Century, being instruction for me aligning a sundial. Two drawings, one for the vertical dial, another for the horizontal. Calculated for Lat. 50° (this
Science · History · Sundials · Technology · Science -- History · Technology -- History
Internet Archive · Smithsonian Libraries and Archives · Public domain (published before 1931). Free to use for anything.
![An illustration from [Sundial] [architectural drawings], 1750, leaf 2](https://img.insideoutlibrary.com/img/1024/ia-sundial00dibn-2-0.webp)
