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A discussion is given of the continential drift theory in its various hypothetical stages. Through the analysis of the existing geological data, it is concluded that two supercontinents, Lavrasia and Gondvana, have existed prior to the middle of the Mesozoic Era. The massifs of the continental crust of Lavrasia consist of old platforms, such as North America, Greenland, Barents Sea, Asia, Russia, Siberia and Kolyma. As a result of the earth's rotation, convectional forces of the earth's crust and cosmogonic causes, the individual massifs become detached from Lavrasian super-continent and began to drift, forming ridges and deep faults. The geological structure of these formations can be associated with the land masses that had drifted away and constitute now either continents, islands, submarine ridges or trenches. (Author), Trans. of Problemy Arktiki i Antarktiki (USSR) n30 p10-18 1969, by M. Slessers.

The UP-1 digital-analog converter is intended for coordinating the operation of the M-20 digital computer with various analog computers. Substitution of the Dnepr-1 computer for the M-20 involved solution of the following problems: (1) as the Dnepr-1 delivers negative 7-v pulses while the Up-1 requires positive 40-50-v pulses, some circuits and assemblies in the Up-1 were altered; (2) special instructions were worked out for feeding digital information into the UP-1 and for taking it out; a simultaneous exchange of information would require 45 binary digits; only 26 digits were available in the Dnepr-1; 3) definitely space pulses are required for access to the UP-1; hence, such pulses had to be designated from those available in the Dnepr-1. Changes in schematics are shown., Edited machine trans. of Seminar Upravlyayushchie Mashiny i Sistemy. Trudy (USSR) n1 p29-37 1968, by Charles T. Ostertag.

The meso-characteristics of hail and shower clouds are presented. Values of radar and temperature parameters are determined, together with a complex criterion for the degree of danger of formation of hail clouds for several months of the warm half-year. (Author), Transl of Meteorologiya i Gidrologiya (USSR) n4 p48-53 1969, by C. R. Haave.