Mining engineer of the Orenburg Cossack army Sergey Aristarkhovich Podyakonov (1871-?)
In Savinova T.N. article. "Mining engineer of the Orenburg Cossack army Sergey Aristarkhovich Podyakonov (1871-?)" it is told about the unknown facts of the biography of S. A. Podyakonov serving as the mining engineer in economic board of Orenburgskogokazachy army in 1904¬1911. Thanks to the few documents found in archives we managed to define his contribution to studying of natural richness of the Orenburg region and influence of the resources reconnoitered by him on development of mining in the Cossack army. Article has been written for the purpose of display of a condition of carrying out geological researches in the territory of the Orenburg Cossack army at the beginning of the 20th century (1904-1917) and work of the mining engineer who has made a contribution to region science.