February 1993 page 28
Robert A. Mills

An Unusual Variety of Equatorial Sundial

This article describes an unusual equatorial sundial without a fixed gnomon, featuring a transparent plastic hemisphere. It illustrates the Sun's apparent path and declination throughout the year, explaining how to determine sun time, altitude, azimuth, and declination on any given date using this instrument.
Dials: Equatorial, Dials: Scaphe, Sundial Design & Layout

June 1993 page 26
Robert A. Mills

A Japanese Sundial

This article describes a large horizontal sundial monument erected in a public park in Tokyo, Japan, at 35°N latitude. It details the sundial's design, including a massive concrete wedge gnomon with a 35° slope, and discusses the calculation of shadow angles. The text explains how the sundial's Noon Mark accounts for the 20-minute difference between Tokyo's local solar time and its national time zone.
Dials: Horizontal