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Special Exhibition Label: 'Atmospheres: Investigating the Weather from Aristotle to Ozone' (19/10/2012 - 07/04/2013)

Detecting Typhoons in the Dutch East Indies

This instrument was installed in the largest Dutch ship of its day, the Johan van Oldenbarnevelt. Launched in 1929, it sailed between Amsterdam and the Dutch East Indies (modern Indonesia) until World War II, when it was converted into a troop ship.

Tropical storms were a hazard of its original voyages, and the major part of this shipboard device is a 'typhoon barometer', an aneroid barometer with a rotating scale of low pressures indicating distance to a typhoon. In the lid is a 'cyclonometer' with a wind rose, adjustable cursors and a rotating glass with painted wind arrows.

Designed in the Philippines by the Jesuit astronomer José Algué, Director of the Manila Observatory, it was made in Germany by the barometer firm of Schmidt & Ziegler.

[Inv 13349]

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