Samuel Sturmy, The Art Of Dialling By The Gnomical Scale (1679). This is the seventh book from Sturmy's very popular The Mariners Magazine. The work originally appeared in 1669, and subsequently went through 3 more editions, “diligently revised and carefully corrected” by mathematician John Colson. This is the second edition.
Unlike other entries in this Shadow Catcher Series, this reprint is done with modern fonts; the graphics are facsimile reproductions.
This can be ordered from LuLu Books: Sturmy: The Art of Dialling By the Gnomical Scale (1679)