George Adams, instrument maker to the king, described this instrument as 'one of the simplest and most elegant compound engines I have ever seen'. It was he who made it. It combines three simple machines: two wheels and axles and a screw. The load was suspended from the axle at the base and hung through the centre of the frame. It was lifted by a 'power' on the large spoked wheel. In theory a weight 6000 times that of the applied force or 'power'.
Richard Glynne (18th century) Armillary sphere-orrery, ca. 1720 Oxford, Museum of the History of Science, inv. 57605 This instrument is a combination of an armillary sphere and a new kind of planetarium called an orrery. It demonstrates the structure of the Copernican universe.
Dip circles, also known as dip needles or inclinometers, measure slope — a.k.a. “dip angle” — with respect to gravity. Used in surveying, mining, and prospecting, dip circles also served as demonstration instruments in physics classes. The Phelps & Gurley Co. of Troy, N.Y., manufactured this brass and glass dip circle around 1848. Dartmouth purchased it in 1862 for 20 dollars.