77 CHINAKAL 



the role of centers of light sensitivity, which form in micro- 

 crystals of silver halides in photographic emulsions as a result 

 of interaction with active components of gelatin. Chibisov also 

 investigated the light sensitivity of photographic emulsions. 

 Bibliography : 



Theory on Photographic Processes, L Moscow: 1935. 

 Theory of synthesis of photographic emulsions. P. V. 

 Kozlov's Technology of Photo-Cinema Film, 2. Moscow- 

 Leningrad: 1937. 



The nature of centers of light sensitivity of photographic 

 emulsions. Uspekhi Khim., 1953, 22, #10. Works of the 

 Scientific Research Cinema-Photo Institute, #8. 

 and others. The Nature of Photographic Sensitivity. 

 Moscow: 1948. 



Investigating the nature of photographic sensitivity. Suc- 

 cesses of Scientific Photography, ^, Moscow, 1957. 

 Biography: 



V. I. Sheberstov. K. V. Chibisov. Journal of Scientific and 

 Applied Photography and Cinematography, 1957,^, #1. 

 Office: Moscow University 



Moscow, USSR 



CHINAKAL, NIKOLAI ANDREEVICH (Mining Engineer) 



N. A. Chinakal was born November 19, 1888. Upon his 

 graduation from the Simferpol Gymnasium, he studied from 

 1907 to 1912 at the Dnepropetrovsk Mining Engineers Institute, 

 and after his graduation worked at the Donbas Mines. 



Chinakal' s work on improving the working conditions of 

 miners promoted him to the rank of progressive specialist, and 

 in 1920, he was appointed assistant to the authorized repre- 

 sentative of the Central Administration of the Coal Industry in 

 the Makeevskii Region; later in 1921, he was elected member 

 of the Central Committee of the All-Russian Union of Miners 

 (VSG) and served as Chief of the Economic Section of the VSG 

 Central Committee. At the end of 1921, Chinakal was appointed 

 a member of the governmental commission of the Council of 

 Labor and Defense, and developed a plan for restoring the 

 Donbas. Upon completion of this assignment, he was trans- 

 ferred to the Donugol Combine, where from 1923 to 1928, he 

 headed the Mechanization Section and concurrently served on 

 the editorial board of Gornii Tekhnik. In 1924-1925, Chinakal 

 was a member of a Soviet delegation of mining engineers who 

 went to the U. S., Britain and Germany to study coal mining 

 processes. From 1940 to 1944 he taught at the Kirov 



