Paris telescope. Newtonian reflecting telescope installed at the Paris Observatory,France,during the 1860s. It had a 1.2 meter (48 inch) diameter mirror. This was the first large telescope mirror to be made of glass coated with silver deposited chemically in a method devised by the German chemist Justus von Liebig. The mirror was much better than those made of polished copper alloy,but the telescope's poor mounting made it nearly useless | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / New York Public Library |
Taille de l’image : | 3274 px × 3554 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
|