| Image | Name | Maker | Comments |
|
Orrey | W&S Jones, London 1795 | With a complex system of gears, the Orrey shows the rotation of the planets around the sun, the Earth's diurnal rotation, precession of the axis with the seasons and corresponding motions of the moon. |
|
Hadley's,. Quadrant | B. Browne, Bristol 1795 | Made of Ebony and brass with an ivory scale. |
|
Gunter's Quadrant | maker unknown c.1660 | Brass, six inch diameter. Used to tell time by the sun and stars, as well as for measurements of azimuth and elevation |
|
Brass Sector | Roger Butterfield Paris, c.1700 | Invented
by Galileo as an aid to calculation,Union’s
Sector was acquired in Paris by Prof. Gillespie about 1840. |
|
Burt's Solar Compass | William J. Young Philadelphia, c.1840 | Patented in 1836 by Austin Burt to overcome problems encountered in surveying in areas with large magnetic distrurbances. |
|
Double Stroke Air Pump | Elkin, Vienna 1855 | Purchased in Europe by Prof. Joy |
4-23-02