849 (Continued) 
Description: 
The Institute was founded in 1922 by merging the former Radium 
Commission and the Laboratories for Mineralogy and Radium Research of the 
Academy of Sciences. During its history, V. G. Khlopin and B. A. Nikitin, 
both deceased, have served as Directors. The work of this institute is 
concerned primarily with radioactivity, its properties, and applications. 
Some recent studies have dealt with measurement of the cosmogenic isotopes 
of the Yardymly meteorite, and RIAN scientists have also established the 
absolute age of Antarctic bed rock. RIAN possessed a cyclotron as early 
as 1940 and is still active in the development and application of nuclear 
physical equipment. The Institute publishes a Trudy. 
850 
Name: Republic Scientific-Research Institute of Local Building Materials 
(Respublikanskiy nauchno-issledovatel'skiy institut mestnykh 
stroitel'nykh materialov--ROSNIIMS ) 
Address: Moscow, Petrovka, 14 
Director: -- 
Deputy Director: -- 
Administrative Affiliation: -- 
Selected Staff Members: 
Yu. M. Butt 
A. A. Mayer 
Description: 
The Institute's research centers on clay and ceramic building 
materials. In their experimental plant, they have done work on brick, tile, 
plaster, silicate, and lime-sand materials. A Trudy is published periodi- 
cally. 
851 
Name: Riga Polytechnic Institute 
(Rizhskiy politekhnicheskiy institut) 
Address: Riga, ulitsa Lenina, 1 
Director: A. K. Malmeyster, Academician (Latvian S.S.R.) (1961) 
Deputy Directors: E. Yu. Gudriniyetse, Docent (1961) 
K. K. Tabak, Docent (1961) 
