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
Silvered and platinized glass (Foucault) in small wooden box Silvered and platinized glass (Foucault) in small wooden box 1857-1868
Circular glass mirror (6-inch), aluminium coated with marked focal ratio of f1. Circular glass mirror (6-inch) 1960-1970
Collection of 15 aluminium coated glass or quartz mirrors from the spectrograph used at the coude focus of the 35-Metre Solar Telescope built in 1955 at the University Observatory, Oxford, unsigned, 1960-1970. Collection of 15 aluminium coated glass or quartz mirrors 1960-1970
Six and a half inch glass mirror in original brass cell, with close fitting tin cap with handle cell 1 1/16" deep outside, exact focal length 7ft 1.75 in, "D" painted on cell and lid Six and a half inch glass mirror in original brass cell 1780-1820
Silver-on-glass mirror of 9-inch aperture by G.H.With, plus driving clock from Canon Cross's equatorial Newtonian telescope (RAS No.141). Presented to the Royal Astronomical Society in 1900 by Mrs Cross. Silver-on-glass mirror of 9-inch aperture by G.H.With 1865-1890
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 completed mirror in it support cell ready to be lift into position on the 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 view shows the completed mirror being lift into position onto the support mechanism of the mirror cell. Bromide print related to and showing various stages in the construction of the Hooker 100-inch reflecting telescope 1916-1918