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Silvered and platinized glass (Foucault)

1857-1868

Silvered glass telescope mirror of diameter 9 1/2 in

1880-1900

Circular glass mirror (10 1/2-inch)

1950

Circular glass mirror (4 1/2-inch)

1934

Circular Glass Mirror, Silver and Platinised, by Leon Foucault, 1857-1868

1857-1868

Glass disc for telescope mirror

1840-1870

Circular glass mirror (80 mm)

1960-1970

Glass wedge mirror aluminised on the hypotenuse surface

1960-1970

Circular glass mirror (5 1/2-inch)

1930-1939
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
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
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
Silvered and platinized glass (Foucault) in small wooden box

Silvered and platinized glass (Foucault) in small wooden box

1857-1868
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
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