because he had cancer
Ulrich Fredrich von Cappelen died in 1820.
He originally came up with the scale when classifying a private collection. He classified them by their physical characteristics rather than their chemical composition, using their relative hardness.
Mayo Mohs died on 1996-08-22.
Frederic E. Mohs died in 2002.
Ulrich Fredrich von Cappelen was born in 1770.
September 29 1839
fredrich wohler
he died in Agro,ITALY on Sunday 3:32 am
fredrich moh
he made the scale of hardness...
Cadmium was invented in 1817 by Fredrich Stromeyer.
Fredrich nietzsche