This article reviews historical techniques for telling time by the moon, noting their limited accuracy due to the moon's irregular movements and the need to convert lunar time to solar time. It describes methods like using correction tables (e.g., Queen's College, Cambridge, or Rene Rohr's diagram) and specific moondial instruments (Oronce Fine, Bion). The author also proposes a new model of lunar dial, adapting a horizontal sundial with "lunar hour lines" as spiral curves.
Dials: Unusual,
Dials: Nocturnals,
Sundial Design & Layout