Excerpt from Journal of the Society of Motion Picture Engineers, Vol. 31: July, 1938 After 1934, the process of optically reducing the sound-track from 35-mm. Negative to 16-mm. Print became the most widely used method of producing 16-mm. Sound-films. Certainly the excellence of the results that were attained justified the widespread adoption of the method. But this brought with it a complication of the stand ards problem. Optical printers were designed to reduce the inch variable-width track on the 35-mm. Film to a width of inch on 16-mm. Film. This ratio of 60 to 71 gave a reduced variable density track having a width of inch instead of the -inch width called for by the 1934 standard. Eventually the 35-mm. Standard was changed to specify a track space inch wide in v.ariable-width recording. This track, on the optical reduction printer, gave a 16-mm. Print having a track width of inch. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.