Paul Philip Barraud (19th century)
Marine chronometer, ca. 1850
Bologna, Museo della Specola, Universitą di Bologna, inv. MdS 75
Marine chronometers, developed from John Harrison's original cronographs but becoming gradually smaller and more accurate over time like the one on display here, were irreplaceable instruments for measuring time and for determining longitude. They soon became standard instrumentation on board every ship and in every astronomical observatory.