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Transit telescope

1770

Objective lens in brass cell of 3 3/4-inch diameter and 50-inch focal length

1850-1900

Portable transit instrument, with case and components

1840-1860

Incomplete portable transit instrument by Troughton and Simms

1826-1851

Portable Transit Instrument by Dollond

1750-1770
Portable transit instrument of 2¼-inch aperture by Thomas Jones, London, with striding level, lamp and glass screen in a fitted box. Accessories include 7 glass levels, 1 magnifier, 2 eyepieces, 2 dark slides and a micrometer slide.

Portable transit instrument of 2¼-inch aperture by Thomas Jones

1816-1850
Photograph of a transit instrument by Repsold at Pulkovo Observatory, St Petersburg, in Russia, 1876.

Photograph of a transit instrument by Repsold at Pulkovo Observatory

1876
Photograph of a transit instrument, by the German instrument maker Ertel, in the Meridian Room of the Pulkovo Observatory at St Petersburg in Russia, 1876.

Photograph of a transit instrument

1876
Photograph of transit instrument, used in the Transit of Venus Expedition 1874

Photograph of transit instrument

1876
Portable transit instrument of 2-inch aperture by Pallant, London with two cases.

Portable transit instrument of 2-inch aperture by Pallant

1839-1869
Photograph of 3" transit instrument, in glazed frame 17 1/4" x 21 1/4".

Photograph of 3" transit instrument

1921
Photograph of the Transit instrument of the Harvard college Observatory at Cambridge Massachusetts.

Photograph of transit instrument

1876
One of two photographs showing a transit instrument by Ertel and a mural circle made by Troughton and Simms at the U.S. Naval Observatory, Washington.

One of two photographs showing a transit instrument by Ertel and a mural circle made by Troughton and Simms

1876
One of nineteen photographs from the Royal Observatory, Cape of Good Hope, South Africa, showing transit instrument pillars erected by the Rev. Fearson Fallows.

One of nineteen photographs from the Royal Observatory

1909
Two photographs presented by Rear Admiral C.H. Davis in 1876, showing three transit instruments at the United States Naval Observatory.

Two photographs presented by Rear Admiral C.H. Davis in 1876

1876
Transit instrument of 3-inch aperture and focal length of 42 inches, with striding level by Dollond with wooden case. This Royal Society instrument was used by Captain Kater for his experiments on the pendulum at the principal stations of his trigonometrical survey.

Transit instrument of 3-inch aperture and focal length of 42 inches

1815-1819
Photograph of the transit instrument of the Nicolaieff Observatory, Crimea in Russia, 1876.

Photograph of the transit instrument of the Nicolaieff Observatory

1876
Photograph of the large transit instrument diameter of object, glass 0.236, metres at the Paris Observatory.

Photograph of the large transit instrument diameter of object

1884
Photograph of a transit instrument, by Gambey, at the Paris Observatory.

Photograph of a transit instrument

1884
Photograph of a meridian circle transit instrument, diameter of objective 0.19 metre at the Paris Observatory.

Photograph of a meridian circle transit instrument, at Paris Observatory, 1884

1884
Drawing in glazed frame of an early transit instrument made by Edward Troughton for his friend, Sir James South [see 1931-352].

Drawing in glazed frame of an early transit instrument made by Edward Troughton

1820