Excerpt from Journal of the Society of Motion Picture Engineers, Vol. 31: July, 1938 Eventually the 35-mm. Standard was changed to specify a track space inch wide in variable-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.