401 TSYTOVICH 



been a Deputy to the U.S.S.R. Supreme Soviet, first, third, and 

 fourth convocations. In 1943 he was awarded a Stalin Prize. 



Tsitsin's main investigations are in the field of hybridization, 

 such as crossing grassy plants with woody plants, and cultured 

 plants with wild growing ones. According to Soviet sources, he 

 created a new form of perennial wheat. Tsitsin and his associ- 

 ates claim that wild rye (sandy and gigantic) can be crossed 

 with wheat, barley, and rye; and also rye with quack grass. He 

 has also obtained hybrids between ordinary and tree-like to- 

 matoes, and produced new forms of stable hybrid variety of 

 winter branching wheat. 

 Bibliography: 



Distant Hybridization of Plants. Moscow: 1954. 

 Problem of Wheat and Perennial Wheat. Moscow: 1935. 

 What Will Crossing Wheat with Quack Grass Produce? 

 Moscow: 1937. 



Investigating vegetative -sexual hybridization of grassy plants 

 with woody plants. Works of the Zonal Institute of Agri- 

 culture of the Non-Chernozem Belt of the U.S.S.R., 1946, 

 #13. 



Ways of Creating New Cultured Plants. Moscow: 1948. 

 Role of Science and Advanced Practices in Raising the Agri- 

 cultural Economy. Moscow: 1954. 

 Office: Main Botannical Garden of USSR Academy of 



Sciences 

 Ostankino, USSR 



TSYTOVICH, NIKOLAI ALEKSANDRQVICH (Geophysicist) 



N. A. Tsytovich was born May 13, 1900. He graduated from 

 Leningrad Institute of Civil Engineers in 1927. In 1930 he be- 

 gan to teach in a number of institutions of higher learning in 

 Leningrad. He became, in 1951, professor of the Moscow Engi- 

 neering Structural Institute. From 1947 to 1953, he was Chair- 

 man of the Presidium of the U.S.S.R. Academy of Sciences 

 Yakut Branch. In 1943 he began work in the Institute of Perma- 

 frost of the U.S.S.R. Academy of Sciences where from 1948- 

 1953, he was deputy Director. He has been a Corresponding 

 Member of the U.S.S.R. Academy of Sciences since 1943 and an 

 Active Member of the Academy of Construction and Architecture 

 of the U.S.S.R. Academy of Sciences since 1956. 



Tsytovich' s main works deal with the study of frozen ground 

 mechanics. 



In 1950, Tsytovich was the recipient of a Stalin Prize. 



