The case of giving privileges to the St. Petersburg merchant Yegor Zubchaninov on the method of installing vertical mills of mil...

The case of giving privileges to the St. Petersburg merchant Yegor Zubchaninov on the method of installing vertical mills of millstones invented by him.N.4/VIII; V.U.26/IX.1828/Department of State Economy.- 1828. -11 l .. - (Department of state savings of the State Council. Inventory No. 1. 1828).-Film..I. Department of State Economy ..Electronic copy source: RGIAOriginal storage location: RGIA f.1152 op.1 1828 d. 80