Yevgraf Fyodorov

Russian mathematician, crystallographer, and mineralogist.

Born December 22nd, 1853 in Orenburg.

Died May 21st, 1919 at 65 years old in Saint Petersburg (pneumonia).

Occupations
academic, crystallographer, geologist, mathematician, mineralogist, mining engineer, naturalist, professor
Wikipedia

Losing your life is not the worst thing that can happen. The worst thing is to lose your reason for living. Jo Nesbø