Institution details

Museum Boerhaave

Leiden, The Netherlands

www.museumboerhaave.nl

9 objects contributed:

Venus transit model by W. Boosman, used for the 1874 Dutch expedition to Reunion

Venus transit model by W. Boosman, used for the 1874 Dutch expedition to Reunion

Frederik Kaiser, the director of the Leiden Observatory, had two models of the Venus transit made. These were used for training the observers, especially when Venus is entering the sun.

Willem Boosm...

Astronomical pendulum by Utzschneider und Fraunhofer, used by the 1874 Dutch expedition on Reunion

Astronomical pendulum by Utzschneider und Fraunhofer, used by the 1874 Dutch expedition on Reunion

The director Frederik Kaiser of The Leiden Observatory bought this pendulum clock in 1838. It has a compensated pendulum after Mahler. The clock was lent to the 1874 Dutch expedition to Reunion.

Utzs...

Micrometer by Troughton and Simms, used by the 1874 Dutch expedition on Reunion

Micrometer by Troughton and Simms, used by the 1874 Dutch expedition on Reunion

The director of the Leiden Observatory, Frederik Kaiser, bought this micrometer after Airy in 1858. The micrometer was lent to the 1874 expedition to Reunion.

Troughton & Simms, London, 1858

Museum ...

Heliotrope from the Leiden Observatory for the 1874 Dutch expedition to Reunion

Heliotrope from the Leiden Observatory for the 1874 Dutch expedition to Reunion

This is one of the three heliotropes made by the instrumentmakers of the Leiden Observatory.

Leiden Observatory instrumentmakers, Leiden, 1873

Museum Boerhaave V13161

Heliotrope for the 1874 Dutch expedition on Reunion

Heliotrope for the 1874 Dutch expedition on Reunion

From the three heliotropes taken to Reunion two were identical. The instrumentmakers made also tight fit boxes as the heliotropes had a long journey to cover.

Leiden Observatory Instrumentmakers, Lei...

Heliotrope used by the 1874 Dutch expedition on Reunion

Heliotrope used by the 1874 Dutch expedition on Reunion

The instrumentmakers of the Leiden Observatory made three heliotropes for the Dutch expedition to Reunion.

Leiden Observatory instrumentmakers, Leiden, 1873

Museum Boerhaave V10840

Heliometer by G & S Merz, used in the 1874 Dutch expedition on Reunion

Heliometer by G & S Merz, used in the 1874 Dutch expedition on Reunion

The financers of the Dutch expedition for the 1874 transit on Reunion bought this heliometer especially for this occassion. After the expedition the heliometer was donated to the Leiden Observatory wh...

Plate measuring machine by Repsold & Sohne, used for the 1874 Dutch expedition at Reunion

Plate measuring machine by Repsold & Sohne, used for the 1874 Dutch expedition at Reunion

This machine was taken on the 1874 expedition to Reunion With this machine the Dutch measured the glass photographic plates made with the photografic telescope.

Repsold & Sohne, Berlin, 1873

Museum...

Achromatic refractor telescope by Utzschneider und Fraunhofer, used for the 1874 transit on Reunion by a Dutch expedition

Achromatic refractor telescope by Utzschneider und Fraunhofer, used for the 1874 transit on Reunion by a Dutch expedition

The telescope was bought by Bernard Stoop. He gave it to the former director of the Leiden Observatory, Frederik Kaiser, to watch Halley's comet in 1835. The heirs of Stoop lent this refractor to the ...

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