Photograph of the Great Rosse Telescope, 1880
1880
One of two photographs (silver prints) of the Great Rosse Telescope taken from the south east. Taken about 1880 by Lieutent-Colonel Harry J. Watson, whilst he was posted to nearby Newbridge.
Photograph showing the 3-foot Rosse Telescope
1880
Photograph (silver print) showing the 3-foot Rosse Telescope with later equatorial mounting from the eastern side. Taken about 1880 by Lieutent-Colonel Harry J. Watson who was posted to nearby Newbridge.
Solar spectroscope by Howard Grubb, Dublin, 1871
1871
Three-prism solar spectroscope with automatic prism adjustment for minimum deviation and a fixed equatorial mounting with drive by Howard Grubb, Dublin, dated 1871. Supplied by the Royal Society of London to J.B.N.Hennessey who used the instrument at Vincent Hill, Dehra Dun in the Indian foothills [7,000 ft.] of the Himalayas to map the solar spectrum between 1871-5.
Polishing tool used with speculum mirror
1840-1850
Polishing tool used with 6-foot speculum mirror by Lord Rosse
Grinding tool used with 6-foot speculum mirror
1840-1850
Grinding tool used with 6-foot speculum mirror by Lord Rosse
One of two photographs (silver prints) of the Great Rosse Telescope from the southwest
1880
One of two photographs (silver prints) of the Great Rosse Telescope from the southwest. Taken about 1880 by Lieutent-Colonel Harry J. Watson, seen seated on the ladder, whilst he was posted to nearby Newbridge.
Oval shaped secondary speculum mirror with cover
1845-1850
Oval shaped secondary speculum mirror with cover, from the 6-foot Rosse telescope
Original "Finder" eyepiece
1845-1850
Original "Finder" eyepiece of the six-foot Rosse telescope
Bed of iron hoops
1840-1850
Bed of iron hoops used for casting three-foot speculum mirror by Lord Rosse