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There are currently 68 objects in the collection.

Leonard Waldo's Plans for Observing the Transit of Venus, 1882, Page 1

Leonard Waldo's Plans for Observing the Transit of Venus, 1882, Page 1

Memo written in July 1882 by Leonard Waldo listing the instruments, equipment and observers in preparation for the Transit of Venus in December 1882. Records of the Astronomical Observatory RU 416 YRG...

Leonard Waldo's Plans for Observing the Transit of Venus, 1882, Page 2

Leonard Waldo's Plans for Observing the Transit of Venus, 1882, Page 2

Memo written in July 1882 by Leonard Waldo listing the instruments, equipment and observers in preparation for the Transit of Venus in December 1882. Waldo also lists desired equipment to be purchased...

Logbooks of the Bologna astronomical Observatory for the year 1761.

Logbooks of the Bologna astronomical Observatory for the year 1761.

The Zanotti’s observations are dated June 5th and not 6th: in fact, astronomical day started at the local noon. Morever, during all the 18th century and until 1866 (shortly after the birth of th...

Marinoni position micrometer by J. Scherer, Vienna, 1732: brass, length 24.5 cm

Marinoni position micrometer by J. Scherer, Vienna, 1732: brass, length 24.5 cm

It is almost certainly the only remaining example of the micrometers designed by Giovanni Giacomo Marinoni from Udine (1676-1755). Marinoni sent to Eustachio Manfredi (1674-1739), first Director of th...

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 ...

Micrometer, Photographic

Micrometer, Photographic

Jaw micrometer. Unsigned. Transferred from the U.S. Naval Observatory.

This is one of eight identical instruments made for the eight American parties sent to observe the Transit of Venus in 1874. M...

Movable quadrant by S. Menini - Bologna, 1710: brass and iron, radius 100 cm.

Movable quadrant by S. Menini - Bologna, 1710: brass and iron, radius 100 cm.

This instrument was used in Bologna by Eustachio Zanotti in order to take the positions of Venus on the Sun during the 1761 transit. It is fitted with two telescopes, one fixed the other movable. It h...

Muddapur, India: the Italian expedition for the 1874 Venus transit

Muddapur, India: the Italian expedition for the 1874 Venus transit

The Italian astronomers' camp in Muddapur (Bengala).

(P. Tacchini: "Il passaggio di Venere sul Sole", Palermo, 1875)

Octant, Astronomical

Octant, Astronomical

All brass octant. Engraved on crosspiece "B. Martin, London" and on index arm "The Gift of Ezekiel Goldthwait Esq. to the Apparatus of Harvard College in Cambridge N.E. May 1764." Given to replace ea...

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