Weights. Four precision weights of various sizes. These weights,of known mass,are used with a lever balance to accurately weigh unknown masses of gold | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Young, Ed |
Taille de l’image : | 2833 px × 3543 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |