In the 19th century. the structure of the Library became more complex, which required an increase in staff. In 1883, in the I (Russian) department, the Slavic department was allocated as an independent unit; in 1893 - the magazine department; in 1901 - the Manuscript Department and the Russian Book Department. A new formatting arrangement of funds was introduced, systems of library classification of academicians K.M. Baer, A.A. Kunik and others. In 1893 the staff of the Library was increased to 10 people; 9.5 million rubles were allocated for the purchase of books.
