Method of cooking cast steel

Method of preparation of cast steel: No. 581. Declared.31.10.1857 / P.M.Obukhov.- [B.M .: B. and., 1857].-55-60 p., 1 l.Il.: table .. -The privilege issued on October 31, 1857, for 10 years, Lieutenant Colonel of the Corps of Mountain Engineers to Obukhov for the method of preparing cast steel invented by him.Ex.: With a handle.litter..I. Obukhov, P.M..1.People (collection).Electronic copy source: PBOriginal storage location: VPTB FIPS