Color enhanced portrait of Julius Robert von Mayer (1814-1878),German physician and physicist. He contributed to an understanding of thermodynamics and explained many physical phenomena by applying the principal of the conservation of energy | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Photo Researchers |
Taille de l’image : | 2287 px × 3636 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : |
|