Zoetrope Sealife This projection was successfully applied

This projection was successfully applied in a new type of astrolabe that offered remarkable advantages over its predecessors because it could be used in any Northern latitude

Measuring the height of a star using the back of the instrument

Miniature of Tide computer made by H

This beautiful instrument is a great gift for the mariner or angler in your life

Zoetrope Sealife This projection was successfully appliedThis reproduction of an early optical device employing the phenomenon of "Retinal Persistence" or Image Retention" is a fine piece for explaining how animated movies work. Sir Issac Newton experimented with this concept in the seventeenth century. In 1834 English mathematician George Horner proposed an apparatus that employed a cylindrical form, an open drum with slots at the top and an image strip placed at this bottom. This item is based on his