Hanging Astronomic Ring Dial sextant Sir Issac Newton experimented with

Sir Issac Newton experimented with this concept in the seventeenth century

5º latitude

anyone who wishes to become engaged with the interactions of the Earth

the Urania Propitia compass is a wonderful pocket size curiosity that will delight as well decorate an office or den

This Instrument was conceived to address the need to predict the time of tidal changes

Hanging Astronomic Ring Dial sextant Sir Issac Newton experimented withMiniature astronomical ring dial. Height sundial. 17th and 18th century. Also known as the Universal Equinoctial Ring Sundial, this instrument is used to determine Solar time. The ring dial, the armillary, or dials indicate the principal circles of the heavenly sphere: the meridian, the equator, and the solstice meridian. This beautiful miniature replica is fashioned of brass and hung on a cord. Also available in miniature and larger desk models