Clemens Alexander
Winkler

Freiberg University of Mining and Technology (Chemistry Tree)






Raphael W.
Pumpelly

U. S. Geological Survey




Reinhard Joh.
Blum

Heidelberg University (Chemistry Tree)


Heinrich
Fischer

Universität Freiburg




Ferdinand André
Fouqué

College de France


Alfred Antoine François
Lacroix

Muséum d'Histoire Naturelle




Clemens Alexander
Winkler

Freiberg University of Mining and Technology (Chemistry Tree)







Frederick Stewart
Turneaure

University of Michigan
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Frederick TurneaureX