A page from a book, possibly the London Encyclopaedia, published by Thomas Tegg, 73, Cheapside in 1828. Titled ‘ A Circular table to find all the Moveable Sundays in the Year’.
The outside ring has the days of the year, the inner volvelle denotes the relationship of Sundays after Trinity, Sundays in Advent, Septuagesima, Easter, etc.
Ask the Dealer
Fletcher Wallis sells objects and books relating to the history of science, medicine and technology from his unit at Admiral Vernon Arcade Portobello Road. He publishes books through Vernier Press, including Antique Medicine Chests, and Corkscrew Patents from 1795. He has been dealing for thirty five years.