One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows wooden shuttering and brackets to support the casting of the concrete pillar of the telescope mounting. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
Great star cloud in Sagittarius, E.E., Barnard, 1905, June 29 centre of plate, R.A., 17h 56m. decl, -28 degree exposure, 4hr. 53m enlarged 1.9 times, 10-inch Bruce doublet of the Yerkes Observatory Hooker expedition to Mount Wilson, California Great star cloud in Sagittarius 1905
Photograph film positive, 16" x 20", portion of the Moon, photographed with the 100-inch Hooker Telescope of the Mount Wilson Observatory, 1919 September 15, region near Copernicus; including Western end of Apennines, with Eratosthenes, size of image 15" x 19 3/16" Photograph film positive 1919
Positive transparency on film, size 8" x 10", "The Owl" Planetary Nebula in Ursa Major ( M97), 60" Telescope Mt. Wilson Positive transparency on film 1966
Glass positive of Hubble's classification of Nebulae (Extra-galactic, elliptical and irregular). Shows: E.0.N.G.C.3379; E.2.N.G.C.221 (M.32); E.5.H.G.C.4621 (M.59); E.7.N.G. C.3115; N.G.C.3034 (M.82); N.G.C.4449. Plate XIV Mount Wilson Contribution No.324. 12"x15" . Prepared from celluloid positive lent by Sir James Jeans. Glass positive of:- Hubble's classification of Neb 1930
Glass positive:- E.E. Barnard, Mount Wilson Observatory, 1911, November 19, 60-inch Reflector, equivalent focal length, 100ft Glass positive:- E.E. Barnard 1911
Glass positive of:- Group of Nebulae in Coma Cluster. Mount Wilson Observatory 100-inch Reflector 10"x12". Prepared from celluloid positive lent by Sir James Jeans Glass positive of Group of Nebulae in Coma Cluster 1930
Glass positive of:- Group of Nebulae in Pegasus (Region surrounding N.G.C.7619). Mount Wilson Observatory 100-inch Reflector 10"x12". Prepared from print lent by Sir James Jeans Glass positive of Group of Nebulae in Pegasus 1930
Glass positive:- Milky way (region of 0 Ophiuchi), Dark Nebula, Barnard 72, R.A., 17h 19m, decl, -23 degrees 39' Mount Wilson Observatory 1921, July 4, 100-inch Reflector, focal length, 42ft, exposure, 2 3/4 hours, 17" x 14" Glass positive:- Milky way (region of 0 Ophiuchi) 1921
Photograph film positive, 16" x 20" central part of the Great Nebula in Orion, photographed with the 100-inch Hooker Telescope of the Mount Wilson Observatory 1920, March 18, exposure 1 3/4 hours Photograph film positive 1920
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the site for the observatory, taken from the 150-foot Solar Tower Telescope. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This nort-west view shows wooden shuttering to support the casting of the concrete pillar of the telescope mounting. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view show an engineering drawing of a cross-section schematic elevation of the telescope from the west showing the Dome, Telescope and Piers. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the concrete pier for the telescope mounting. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view looking south shows the observatory dome under erection. Assembling the Hooker Telescope building, c. 1916 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This south-west view shows the completed observatory from ground level with the dome shutter part open. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the steel brackets of the telescope's Polar Axis in a planing machine in the engineering works of the fabricator. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the stationary floor of the observatory building and the tracks, wheels and framework of the dome and balcony on the right. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the mirror at the early grinding stage in the optical workshop. Grinding & polishing machine for the Hooker Telescope mirror, 1910-16 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the top section of the main girder of the Dome being transported on the rough mountain road. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the top section of the main girder of the Dome being raised into its final position from the moving Balcony floor. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the framework for the moving Balcony floor of the Dome. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows a middle section of the telescope tube arriving at the Observatory. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the mirror cell with its upper section removed revealing the support mechanism and the water pipes for temperature regulation. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the telescope's completed Polar Axis and the lower section of the tube being assembled in the observatory dome. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the mirror support cell for the telescope arriving at the Observatory on a lorry. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows a model of the telescope mounting. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the un-silvered mirror raised into the vertical for testing in the optical workshop. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918
One of 41 bromide prints related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope at Mount Wilson, California. This view shows the concrete pier for the telescope mounting and the iron columns for the observatory building with 150-Solar Tower Telescope in the distance. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918