Perovskiĭ, Vsevolod Dmitrievich, 1860-1923
The manuscripts primarily concern calendar reform, including Perovskiĭ's calculations and ideas on how to proceed with this reform. The printed materials consist of eight copies of "T︠S︡erkovnyĭ Vestnik" seven with articles by Perovskiĭ, and one with his obituary.