Stamp: Carl Josef Bayer (1847-1904) chemist (Austria 1987)
Carl Josef Bayer (1847-1904) chemist (Austria 1987)
22 June (Austria ) within release Int. Light Metal Convention goes into circulation Stamp Carl Josef Bayer (1847-1904) chemist face value 5 Austrian schilling
| Stamp Carl Josef Bayer (1847-1904) chemist in catalogues | |
|---|---|
| Michel: | Mi:AT 1889 |
| Yvert et Tellier: | Yt:AT 1718 |
Stamp is vertical format.
Carl Josef Bayer (also Karl Bayer) was an Austrian chemist who invented the Bayer process of extracting alumina from bauxite, essential to this day to the economical production of aluminium.Stamp Carl Josef Bayer (1847-1904) chemist it reflects the thematic directions:
A chemist (from Greek chēm(ía) alchemy; replacing chymist from Medieval Latin alchemist)[1] is a graduated scientist trained in the study of chemistry, or an officially enrolled student in the relevant field. Chemists study the composition of matter and its properties. Chemists carefully describe the properties they study in terms of quantities, with detail on the level of molecules and their component atoms. Chemists carefully measure substance proportions, chemical reaction rates, and other chemical properties. In Commonwealth English, pharmacists are often called chemists.
