We use Optical Character Recognition (OCR) during our scanning and processing workflow to make the content of each page searchable. You can view the automatically generated text below as well as copy and paste individual pieces of text to quote in your own work.
Text recognition is never 100% accurate. Many parts of the scanned page may not be reflected in the OCR text output, including: images, page layout, certain fonts or handwriting.
88 SOUND MOTION PICTURES
flashlight to illuminate the cell interior. The acid level should be about a quarter of an inch above the top of the plates. It should never be allowed to get down to the very top of the plates; on the other hand, it should not touch the bottom end of the filling tube. Add the necessary amount of water by running it in slowly before charging. Batteries require more water in hot weather than in cold weather. Distilled water may be obtained at any drug store or battery service station. It is best to buy it in large bottles of one-gallon to five-gallon capacity and fill the cells either directly from the bottle through a rubber tube or else by a special filling cup. Do not use a hydrometer for this purpose. Once each week wipe off the battery tops and connectors with a rag moistened in a solution of baking soda in water, or a solution of household ammonia and water in equal parts. Occasionally, after cleaning, coat the battery terminals with vaseline. If, for any reason, batteries are not in use, keep them fully charged. Test their gravity and add water once a month. Connections must be tight at all times. Keep the battery room constantly well ventilated.
Although the above constitutes an up-to-date, complete account of the gross elements of equipment and a detailed survey of their use and care, anyone handling the devices will find constant need of consulting engineers' or manufacturers'manuals. To facilitate understanding of the terms used by such experts or publications I have compiled in the Glossary of this book a list of expressions which offer further information that has been found useful by managers, projectionists, and other members of the theatre staff. It might be wise for each operator to have such a list copied or compiled to suit his needs and those of his employees, old or new.