Inflating a hydrogen balloon, 1845. Hydrogen is produced by covering barrels of iron filings with sulphuric acid. The gas is then fed into the balloon. | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Heritage Images / Ann Ronan Picture Library |
Taille de l’image : | 3863 px × 2598 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |