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Horse glanders and Wollastons goniometerApparatus for treating horse glanders and William Hyde Wollastons reflective goniometer, to measure the angles of minute crystals with precision. Copperplate engraving after a drawing by J
A Collection of GoniometersA collection of antique scientific instruments known as goniometers held within the Natural History Museum. They were used for measuring interfacial angles of very small crystals
GoniometerFor measuring face angles to check symmetry and aid identification