The Information Film. is exactly that sort of operational and persuasive guide service for public librarians.Miss Waldron
inches.Price, $2.50; $2.70 outside of the United States.These two volumes contain 40 reprints of papers and 52 summaries of papers on the subject of vacuum-tube theory and practice.They were all written by RCA authors and have been collected in these volumes from the many scientific and technical journals in which they originally appeared between the years 1935 and 1948.The papers and summaries in each volume have been divided into four groups: general, transmitting, receiving, and special.Each volume also contains a bibliography of additional papers and articles by RCA authors on vacuum tubes and related topics which have appeared in journals and trade papers.The bibliography in Volume 1 has some 400 items published between 1919 and 1941 while that in Volume II has 170 published between 1942 and 1948.Although the papers in these volumes have all been available for some time to those with access to a fairly complete library of scientific periodicals, motion picture engineers in general who are interested in the theory and application of electron tubes will be grateful to the Radio Corporation of America for bringing together from many widely scattered sources these contributions from RCA workers.Motion picture sound engineers will find many of these papers of pa> ticular interest and value if they are not already familiar with them.
This paper relates to techniques which have been developed at the Bell Telephone Laboratories for taking high-speed motion pictures in full color. Different types of incandescent light sources necessary to provide the extremely high level of illumination are described and illustrated.
