Go back to article: Reading, writing, drawing and making in the 18th-century instrument trade
© Museum Boerhaave, Leiden
Jan van Musschenbroek and Willem ’s Gravesande, machine for experiments on a pendulum moved by a spring. Oak, iron, brass and steel, 1700 x 935 x 700 mm, c. 1733, Museum Boerhaave Inv. No. 9629 (de Clercq, 1997a, p 43).