Photograph of siderostat by T Cooke and Sons, Royal Society
1876
Photograph of siderostat by Foucault of the Paris Observatory
1876
Photographs (2) of a siderostat constructed by Messrs Cooke and Sons of York
One of two photographs of a siderostat constructed by Messrs Cooke and Sons of York
One of two photographs of a siderostat constructed by Messrs Cooke and Sons of York
Photograph of 18" Siderostat in glazed frame 17 1/4" x 21 1/4"
1921