Пермский Биологический научно-исследовательский Институт

— ІЗ —
the two scientific organs, which are being published by Institute. The increase
of the issue of Bulletins to a number of 1000 copies and the publication of
Trcivaux favoured the publication exchange, which ran up to 515 copies
with the foreign institutions and to 3C0 with the inland ones.
In the activities of the Institute there are three periods of development.
During the first period, lasting from the beginning to 1925, work Is
carried on in several sections and is concentrated chiefly in the Perm Uni­
versity laboratories and at the Kama Biological Station (settlement Nizhnyaya
Kurya, 12 km. of Perm). Scientific work of this period bears individuastic
character and it is only in the histological laboratory that a group of colla­
borators works out closely related problems.
To this period belong a number of investigations by Prof. Z avarzin
and his assistants (Danini, L azaren k o , Orlov) on the parallelism of the
structures of organs having the same functional meaning; studies on the
flora of the Urals by P. V- Syuzyov, K. N. Ig o sh in a , A. A. K hrebtov; on inferior organisms by A. H. H enckel; on the permeability of plasma
by D. A. Sab in in ; on the water 'regimen of plants by A. A. R ichter;
on the embryology of invertebrates by P. G. Sv etlo v ; on the embryology
of vertebrates by V. K. Schm idt; on experimental zoology by V. N.
B eklem ish ev and A. O. T auson ; on chemical mechanics D. V. A lexey ev ;
on nervous and muscular physiology and the explanation of the nature of
of anaphylaxy.
The second period (1925 —1930) is characterized by the development
of expedition activities. The Institute, as it were, leaves the laboratory walls
and the environs of the town of Perm and largely develops its scientific
work throughout the Ural province and even beyond its boundaries.
For this period 9 large-scale expeditions were organized. The Insti­
tute took part in the Kara expedition, arranged the investigation of the
Kama and of its „flood plain with a view of studying the soil and hydro­
chemical, hydrobiological, ichthyological and geobotanical relations and set
going the study of the Kurgan district, the Ural province etc. The results
of many of the expeditions are published in Travaux and Bulletins.
To this period belong the works by prof. D. A. Sabin in and his
assistants on the mineral nutrition of plants and on soil microbiology, by
A. G. H en ckel on the phytoplankton of the Kara sea; the investigation
of soils in a number of the largest subdistricts of the former Ural province
under the guidance of prof. V. V. N ikitin; geobotanical work under the
guidance of prof. V. I. Baranov, P. N. K ra so v sk i, L. A. T refilo va;
studies on the fauna of the Kama floodplains, on the methods of deter­
mination of the overground fauna under the guidance of prof. V. N. Be­
klem ishev; on the sanatoriums by prof. A. I. A lexeyev, on the double
liquid systems by prof. N. A. Trifonov.
The third period begins since the reorganization of the Institute per­
formed in 1930, being a critical year of its activities. The Institute fully
tackles the working out of scientific problems directly touching the needs
of socialistic construction of the country ant in particular the construction