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Photograph of the instruments used by the British expedition when observing the 1919 total solar eclipse in Brazil.

Photograph of the instruments used by the British expedition when observing the 1919 total solar eclipse in Brazil.

1919
Italian draw-tube refracting telescope, 1714-1722

Italian draw-tube refracting telescope, 1714-1722

1714-1722
Scale model of Loewy's Coude (elbow) Telescope, 1892

Scale model of Loewy's Coude (elbow) Telescope, 1892

1892
Cardboard draw tube telescope

Cardboard draw tube telescope

1751-1800
Photograph of the equatorial by Merz, 1865

Photograph of the equatorial by Merz, 1865

1865
Photograph of the 8 inch equatorial used in Japan for the French Transit of Venus Expedition 1874

Photograph of the 8 inch equatorial used in Japan for the French Transit of Venus Expedition 1874

1874
Photograph of a large equatorial by Merz and Mahler at the Pulkovo Observatory, St Petersburg in Russia, 1876.

Photograph of a large equatorial by Merz and Mahler at the Pulkovo Observatory

1876
One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory, South Russia.

One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory

1928
Glass positive:- Franklin-Adams astro-camera, this shows the instrument with which the photographs were obtained for the Franklin-Adams chart, the lens was a Cooke Triplet of 10-in, aperture, and 45-in, focal length, a few of the 206 photographs obtained are also exhibited, each plate was 15 inches square, and the complete series affords a photographic representation of the whole sky, 15" x 15"

Glass positive:- Franklin-Adams astro-camera

1929
Photograph of 7" equatorial telescope

Photograph of 7" equatorial telescope

1921
One of six photographic enlargements showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Photographic enlargement showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory

1928
Six Bromide enlargements showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Bromide enlargements showing construction of equatorial refractor for Johannesburg observatory

1928
One of six photographic enlargements showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Photographic enlargement showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory

1928
Five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory, South Russia, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Bromide enlargements showing construction of equatorial refractor for Nikolaieff observatory

1928
One of nineteen photographs taken at the Royal Observatory at the Cape of Good Hope, showing the Carte du Ciel twin astrographic refractor by Howard Grubb, Dublin.

One of nineteen photographs taken at the Royal Observatory at the Cape of Good Hope

1909
Telescope "G10" engraved Thos Jones, Charing Cross, London, "3 1/2" O.G. body 3' 7 1/2" long 3 3/4" diam, 3 inverting eye pieces, 1 erecting eyepiece, tube with two powers, 2 dark glasses, 1 brass cap for eye end, finder 10 3/8" x 7/8", in mahogany box with key

Telescope "G10" engraved Thos Jones, Charing Cross, with case

1815-1850
Telescope by C. S. Passemant at the Louvre, Paris, signed round 3 cm objective "Inventium Dollondi/Detexit Passemant/mense Xbre 1760", bound in green fishskin and gilt brass, in two screwed sections in crimson velvet bag with leather drawstring.

Telescope by C. S. Passemant at the Louvre

1760
One of six photographic enlargements showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Photographic enlargement showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory

1928
One of six photographic enlargements showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Photographic enlargement showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory

1928
One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory, South Russia.

One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory

1928
One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory, South Russia.

One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory

1928
Transparency, 15"x12", Modern Astronomers (from photo taken at Royal Observatory)

Transparency, 15"x12", Modern Astronomers (from photo taken at Royal Observatory)

1931
Photograph showing a model of the 27 in-refracting telelescope being built for the Imperial Observatory, Vienna by Howard Grubb of Dublin, Ireland. The model was displayed by Howard Grubb and Sons in the 1876 exhibition of scientific instrument at the South Kensington Museums.

Photograph showing a model of the 27 in-refracting telelescope being built for the Imperial Observatory

1876
One of six photographic enlargements showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Photographic enlargement showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory

1928
Astronomical single-draw telescope with non-achromatic lens, varnished wood and brass, by Nairne and Blunt, London.

Astronomical single-draw telescope with non-achromatic lens

1774-1793
Photograph of 26" equatorial, silver print, 7" x 9"

Photograph of 26" equatorial

1876
One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory, South Russia.

One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory

1928
One of six photographic enlargements showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory, prepared from negatives lent by Sir Howard Grubb, Parsons and Co.

Photographic enlargement showing the construction of the 26-inch equatorial refracter for Johannesburg Observatory

1928
One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory, South Russia.

One of five Bromide enlargements showing construction of 41 inch equatorial refractor for Nikolaieff observatory

1928
Photograph of 9.62" equatorial, silver print, 7" x 9"

Photograph of 9.62" equatorial

1876
Dialytic telescope of 60 mm aperture and 750 mm focal length by S.G. Plössl, Wien on an altazimuth mounting with folding tripod and fitted box. Accessories include 3 eyepieces and solar filter.

Dialytic telescope of 60 mm aperture and 750 mm focal length by S.G. Plössl

1830-1840
Astronomical refractor with 3 3/5-inch (92mm) triplet objective of 45-inch focal length by Peter Dollond, without stand [RAS No.16]. Used by the Rev. Francis Wollaston (c.1770-1820) and presented to the Royal Astronomical Society in 1828 by William Hyde Wollaston. Later given to the British Astronomical Association in 1957.

Astronomical refractor with 3 3/5-inch (92mm) triplet objective of 45-inch focal length by Peter Dollond

1771