Hemisferium Lunar Calendar & Tidal Abacus
This beautiful replica consists of a Perpetual Moon phases calendar on the front face and a Tidal Abacus or computer on the back.
This instrument was conceived to address the need to predict the time of tidal changes. It draws on the intimate of the Moon and the Earth which influences the tides.
Knowledge of the lunar phases has been of great importance for many cultures - calendars, religious festivals, and agricultural practices were all set according to the moon. The Tidal Abacus, or calculator, is employed to predict the time of tidal changes. The tides, with their constant change in the water level, greatly affect navigation both in harbours and for fishing.
To develop this instrument, various pieces from the sixteenth and seventeenth centuries including astronomical compendiums, volvelles and abacuses were studied in detail.
This beautiful historical piece is displayed on an elegant wooden stand and will make an eye-catching decorative centrepiece.
Materials: Zamac brass plated and lacquered, wood stand (sapelli)
Measurements: Maximum Height: 162mm / Diameter: 120mm / Thickness: 7mm
Shipping Options (UK Mainland)
Orders placed before 2:00 p.m. GMT will be processed the same day (Monday-Saturday). Delivery options are selected at checkout.
Standard Delivery
- 2-3 business days.
- £2.95.
- FREE delivery over £40.
First Class Delivery
- 1-2 business days.
- £3.95.
Express Courier Delivery
- 24 hours.
- £7.99.
For shipping to locations outside of the UK mainland, see our full shipping policy.
Returns
Unopened goods may be returned for a full refund within 30 days of receipt of your order. For further details, see our full returns policy.
Phone
+44(0)1436 670806
Our Address
Curious Minds Science Ltd (Grasshopper Toys)
112 West Princes Street
Helensburgh
Argyll & Bute
G84 8XD
United Kingdom
