Chaired by N. M. Popov, under the secretary V. V. Nikolaev; attended by Messrs. honorary members: E. V. Adamyuk, K. A. Arnshtein, I. M. Dogel; biennium Active members: V. S. Boldyrev, V. I. Vasyatkin, B. I. Vorotynskiy, A. F. Geberg, V. N. Dolgov, G. A. Klyachkin, N. A. Mislavskiy, I. I. Naumov, D. V. Polumordvinov, I. A. Praksin, V. I. Razumovskiy, A. S. Segell, L. A. Sergѣev, A. I. Smirnov, I. V. Sorokovikov, D. A, Timofeev, A. E. Yapishevskiy; guests: prof. D. I. Dubyago, prof. P. M. Lyubimov, E. K. Meyer, Dr. Kampov, Melkikh, Rgmovich, Nebolyubov, Fedorov, Romanov, Favorskiy, Pechurkin, Ryasintsev and about 250 people of the public.