The SciencesSundials and their Construction—IPlanning Simple Equatorial and Horizontal DialsBy R. Newton Mayall, Margaret Walton Mayall on February 1, 1934AdvertisementABOUT THE AUTHOR(S)Recent Articles by R. Newton MayallSundials and Their ConstructionSundials and their ConstructionSundials and their Construction--VIRecent Articles by Margaret Walton MayallSundials and their ConstructionSundials and Their ConstructionSundials and their Construction