Using a speaking tube to communicate with someone or another room or on another floor. From ''Natural Philosophy'' by A. Ganot,London,1887 | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / UIG / Universal History Archive |
Taille de l’image : | 5036 px × 4164 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |