Photograph of the instruments used by the British expedition when observing the 1919 total solar eclipse in Brazil. 1919
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
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 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
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
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
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
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 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
Transparency, 15"x12", Modern Astronomers (from photo taken at Royal Observatory) Transparency, 15"x12", Modern Astronomers (from photo taken at Royal Observatory) 1931
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
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
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
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 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
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
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