Dialing: Plain, Concave, Convex, Projective, Reflective, Refractive
William Leybourn, English (1626-1716)
London : printed by H. Parker, for A. Bettesworth, 1728.
Born in 1629, William Leybourn was a prolific mathematician and printer who focused his work on applications of math for surveying and navigation. Leybourn was an avid author throughout his life, and wrote several books that discussed mathematical instruments that were applicable for surveyors and sea navigators. Leybourn includes dozens of images that instruct the reader on how to build a use a dial as well as showing dials being used in educational, naval, and domestic settings. At the end of the book, Leybourn includes an elaborate image of the Pyramidical Dial that sat in the gardens of King Charles II and served as an idealized example of what dialing could become.