I.P. Pavlov and students in the vivisection room, Physiology Department at the Imperial Institute of Experimental Medicine, St Petersburg. Photograph, 1904.

Left to right: B.P. Babkin (pouring tea), S.V. Paraschuk (behind), V.V. Savich (foreground, drinking), V.N. Boldirev (in white coat), L.A. Orbeli (behind), E.A. Ghanike, P.A. Arbekov (seated at table), L.F. Piontkovskiy (?), V.P. Neelov, N.I. Heiman, G.B. Barlatskiy, I.S. Tsitovitch