403 TUMANOV 



On the coefficient of chromatic aberrations of the first 



order. Zhur. Tekh. Fiz., 1945, 15, #9, 585-597. 



Influence of errors in the production of reflection prisms on 



the passing of rays in them. Zhur. Tekh. Fiz., 1934, 4, #4, 



719-747. 



Reflection systems with three mutually perpendicular planes 



in the case of minor deviations of angles from the right 



angle. Works of the State Optical Institute, 1941, 15, #112- 



120, 137-147. 



Biography: 



A. I. Tudorovskii — Honored Scientist of the R.S. F.S.R. Zhur. 

 Tekh. Fiz., 1956, 26, #9, 2125. 



Office: USSR Academy of Sciences 



Leninskii Prospekt, 14 

 Moscow, USSR 



TUMANOV, IVAN IVANOVICH (Plant Physiologist) 



I. I. Tumanov was born June 30, 1894. He graduated from 

 the Kiev Agricultural Institute in 1923. From 1925 to 1942, he 

 worked at the All -Union Institute of Horticulture in Leningrad. 

 In 1940, he worked at the U.S.S.R. Academy of Sciences Insti- 

 tute of Plant Physiology where he became a professor in 1947. 

 In 1953, he was elected to the U.S.S.R. Academy of Sciences as 

 a Corresponding Member. 



Tumanov' s work is in winter endurance, drought-resistance, 

 water treatment and fruit-yields of agricultural crops. He de- 

 veloped methods of laboratory determination of drought- 

 resistance and frost-resistance of plants; he studied in detail 

 the process of adaption of plants to winter conditions, and 

 worked out a laboratory method of determining frost-resistance 

 of field cultures. He carried out experimental studies on the 

 physiology of rotting, the destruction of plants through excess 

 moisture and under an ice crust. He has also worked on the 

 physiology of fertility in cultured plants. 

 Bibliography: 



Physiological Basis of Frost-Resistance of Cultured Plants. 

 Moscow-Leningrad: 1940. 



Main Achievements of Soviet Science in the Study of Frost- 

 Resistance of Plants. Moscow: 1951. 

 and E. Z. Gareev. Influence of organs of fertility on the 

 female plant. Works of the Institute of the Physiology of 

 Plants of K. A. Timeryazev, 1951, 7, #2. 



