BRASS PERPETUAL CALENDAR / LUNAR CALENDAR

BRASS PERPETUAL CALENDAR / LUNAR CALENDAR

Stock Number: 8088

$750.

For sale, small brass perpetual calendar / lunar calendar with rotating disk for Day of the Month on one side. The other side carries a volvelle for Moon's age and dating the lunar month.

Dimensions

1-1/2" (3.7 cm)

Circa

c. 19th century

Country of manufacture

UK and Ireland

Categories: Scientific, Natural history, Calendars, Timekeeping

Description

PERPETUAL CALENDAR / LUNAR CALENDAR, English, 19th century, made of brass 1-1/2″ (3.7 cm) in diameter. One side has a rotating disk marked “Day of the Month For Ever,” with a smiling sunface and a ring of month dates. This reads against a fixed ring of weekdays. The other side has a volvelle marked “Moon’s Age, Phases, and Southings,” with circular scales of twice-12 hours, date of the lunar month, and weekdays. An eccentric circle indicates fullness of the moon. In fine condition, this is an uncommon form of lunar / solar calendar. We note a variant version, undoubtedly by the same maker, marked as a tidal calendar “High Water and Moon¹s Age” (Tesseract Catalogue 38, item 58). (Featured in “Wondrous Devices” exhibition, Hudson River Museum, 2018).

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US TESSERACT

David and Yola Coffeen both have enjoyed academic careers, as planetary astronomer and as linguist/educator. But since 1982 (yes, 1982!) they have been full-time dealers in early scientific and medical instruments, under the name Tesseract. Selling primarily by catalogue (over 100 issued so far) they also have a web presence at www.etesseract.com, and can be contacted at mail@etesseract.com.

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