Hour-glass. Multiple-exposure image of an hour glass. An hour glass is an ancient instrument used to measure a fixed length of time by allowing a fixed quantity of sand to flow through a hole | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Craddock, Tony |
Taille de l’image : | 3655 px × 5495 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |