Die Notizbücher des Mineralogen und Petrographen Friedrich Becke 1855–1931 ... - Margret Hamilton - Google Books

https://books.google.de/books?id=JY-pDQAAQBAJ&pg=PA291#v=onepage

The notebooks of mineralogist and petrographer Friedrich Johann Karl Becke (1855-1931) give impressive testimony to the scientific practices at the turn of the century. Moreover, they provide a detailed insight into Becke’s working style and depict a…