This is a reprint of the book by Russian historian and archeologist D.I. Prozorovskii (1820-1894) about Russian coins and Russian monetary systems from the beginning to the end of the 18th century. The author analyzes the value of coins, their weight and size during the shift from one monetary system to other. Also analyzed are local monetary systems: Novgorod, Tver", Smolensk, Pskov, and Polotsk. (0.415 kg.)