Workmen in a Virginia City retort house. They are removing quicksiler,which will be used again,from the silver amalgam created earlier in the refining process | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / New York Public Library |
Taille de l’image : | 3971 px × 2522 px |
Model Release : | Non requis |
Restrictions : |
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