Purification of Sulphur
Numéro d’image : 12289528
| This apparatus was used to purify sulphur obtained from the vicinity of the Italian volcanoes at Etna in Sicily and the solfatara of Pozzuoli near Naples in the early 19th century. This sulphur contains many impurities, for example soil, gravel, sand, natural sulphides, etc. Purification consists of heating the sulphur to the temperature where it becomes volatile thus enabling the process of sublimation to occur. In this apparatus, two earthenware or fire-clay jars A A' are placed in the furnace which is lighted when the jars have been filled with the sulphur and their tops sealed (luted). Sublimation occurs when heated sufficiently for the sulphur to vaporise. The vapour passes into the condensing jars B B' where it solidifies into a pure state. | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Terry, Sheila |
| Taille de l’image : | 3921 px × 4555 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
Prix pour cette image À partir de 45 €
Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €