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There are currently 68 objects in the collection.

The Italian astronomers' bungalow at Muddapur, India, 1874

 The Italian astronomers' bungalow at Muddapur, India, 1874

The Italian expedition to India in 1874 set up camp with a number of tents for the observing instruments. The astronomers themselves lived in this "bungalow". Image from Pietro Tacchini, Il passagi...

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 ...

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...

British photograph of 1874 transit from Rodrigues Island

British photograph of 1874 transit from Rodrigues Island

A glass plate (numbered 5) from the British 1874 expedition to Rodrigues Island. The identification has been scratched on the body of the sun (in reverse here) and the plate also carries a paper label...

British photograph of the 1874 transit taken in Melbourne

British photograph of the 1874 transit taken in Melbourne

This image has been preserved along with other British photographs of the 1874 transit. It is identified only by the faint "Melbourne" written onto the glass plate. The exact circumstances in which it...

Calibration table for the Marinoni position micrometer by J. Scherer

Calibration table for the Marinoni position micrometer by J. Scherer

On the last page of volume IV of the Records of the Specola di Bologna, dated May 1734, there is a calibration table for the micrometer written by Eustachio Manfredi (1674-1739), who was the first ast...

Camp Brooklyn, Santa Cruz, Patagonia, December 16, 1882, Hand-Tinted Photograph

Camp Brooklyn, Santa Cruz, Patagonia, December 16, 1882, Hand-Tinted Photograph

OHA 111

Bell Collection

Clock

Clock

Clock by Thomas Tompion, London, ca. 1675.

As the most accurate clock at Harvard in 1761, this one-hundred-year old, "excellent pendulum clock" was taken to Newfoundland by John Winthrop to obser...

Clock, Regulator

Clock, Regulator

Astronomical regulator clock made in London by John Ellicott ca. 1765 to replace similar clock lost in the Harvard Hall fire of 1764.

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