| ... Da offene Flammen häufig zu Explosionen von Methangas in Kohlebergwerken führten, schrieben Grubenbesitzer einen hoch dotierten Preis zur Erfindung einer explosionssicheren Lampe aus. So wurde die Davy-Lampe entwickelt. Das Geheimnis war ein simples, engmaschiges, Drahtgitter um die offene Flamm ... more... Da offene Flammen häufig zu Explosionen von Methangas in Kohlebergwerken führten, schrieben Grubenbesitzer einen hoch dotierten Preis zur Erfindung einer explosionssicheren Lampe aus. So wurde die Davy-Lampe entwickelt. Das Geheimnis war ein simples, engmaschiges, Drahtgitter um die offene Flamme. Dieses Gitter verhindert, durch Wärmeableitung, die Entzündung von Gas außerhalb der Lampe. Die Weiterentwicklung war der Einsatz von wiederaufladbaren Akkus statt ... Ein Beitrag von Peter Seroka und Wilhelm W. |
| Inclusions are inside the crystal enclosed foreign materials like liquids, gases, hydrocarbons (oil, asphalt), sediment, NaCl, as well as other minerals or crystals. Inclusions can be a sort of fingerprint of the place of dicovery. Thus inclusions show us under which geologic conditions minerals had ... moreInclusions are inside the crystal enclosed foreign materials like liquids, gases, hydrocarbons (oil, asphalt), sediment, NaCl, as well as other minerals or crystals. Inclusions can be a sort of fingerprint of the place of dicovery. Thus inclusions show us under which geologic conditions minerals had formed. This allows conclusions on the place of discovery. The article deals with the different kinds of inclusions, her conditions of build, which minerals do often have inclusions and how they appear. (Full text in german) |
| On the site of Sos Enattos mine exploitation in shafts and tunnels is known since the Roman times. In 1960, with the exploitation of the deposit, these tracks have been permanently deleted. Initially, it was operated in the mining of silver and galena and only in modern times to sphalerite... (Wri ... moreOn the site of Sos Enattos mine exploitation in shafts and tunnels is known since the Roman times. In 1960, with the exploitation of the deposit, these tracks have been permanently deleted. Initially, it was operated in the mining of silver and galena and only in modern times to sphalerite... (Written in german) |
| The mining in the Franconian Forest has produced a lot of pits in the area and counts to the oldest mining areas in Germany. Indeed, one searches in the World Wide web in vain according to the information of which are documented by photos or maps. This comprehensive contribution gives you a wide vie ... moreThe mining in the Franconian Forest has produced a lot of pits in the area and counts to the oldest mining areas in Germany. Indeed, one searches in the World Wide web in vain according to the information of which are documented by photos or maps. This comprehensive contribution gives you a wide view into this extended mininig area. Researched and written from Michael Kommer (in german language) |