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Photograph of the instruments used by the British expedition when observing the 1919 total solar eclipse in Brazil.

Photograph of the instruments used by the British expedition when observing the 1919 total solar eclipse in Brazil.

1919
Heliostat by Jules Duboscq, 1850-1880

Heliostat by Jules Duboscq, 1850-1880

1850-1880
Heliostat by Spencer & Son

Heliostat by Spencer & Son

1860-1890
Heliostat, contrived by the late G. Johnstone Stoney

Heliostat, contrived by the late G. Johnstone Stoney

1895
Heliostat with spring driven clock drive for use with table top spectrometers by Adam Hilger Ltd.

Heliostat with spring driven clock drive for use with table top spectrometers by Adam Hilger Ltd.

1919
Small heliostat on mahogany base/stand with clockwork drive

Small heliostat on mahogany base/stand with clockwork drive

1875-1885
Heliostat by Monckhoven

Heliostat by Monckhoven

1850-1875
Copy of Gravesande's first heliostat

Copy of Gravesande's first heliostat

1878
Solar telescope consisting of heliostat with fixed mirror and extending lens, made for use in the 'Exploration Gallery' to project an image of the Sun into the display.

Solar telescope consisting of heliostat with fixed mirror and extending lens

1975-1977
Two photograph mounted together of an 18inch Coelostat, made for the Canberra Observatory, New South Wales by Sir Howard Grubb, Parsons & Company at their optical works in Newcastle-on-Tyne, England.

Two photograph mounted together of an 18inch Coelostat

1921-1931
Photograph of Universal heliostat designed by Lord Blythswood [mounted with 1876-1001/2/3]

Photograph of Universal heliostat designed by Lord Blythswood

1876
Photograph showing a selection of scientific instruments from the Physical Cabinet (collection) of the Royal University of Padua, Italy. These include heliostats by Tessarolo and Silbermann, a projector by Duboscq, lamp by Carlevaris, lamp for producing Drummond's light, and regulator for an electric arc lamp. The print was supplied by Prof Rossetti for display at the 1876 Loan Exhibition held at the South Kensington Museums, London.

Photograph showing a selection of scientific instruments from the Physical Cabinet of the Royal University of Padua

1876
Photograph of the original Gravesande Heliostat in the Conservatoire des Arts et Metiers, Paris

Photograph of the original Gravesande Heliostat in the Conservatoire des Arts et Metiers

1876
Modern clock heliostat with Japanese markings

Modern clock heliostat with Japanese markings

1900-1930