United States Tariff Commission
| Preis: | 14.95 EUR* (inkl. MWST zzgl. Versand - Preis kann jetzt höher sein!) |
| Versand: | 0.00 EUR Versandkostenfrei innerhalb von Deutschland |
| Partner: | buecher.de |
| Hersteller: | Forgotten Books (Author, Unknown) |
| Stand: | 2015-08-04 03:50:33 |
Produktbeschreibung
Excerpt from United States Tariff Commission: Information Concerning Optical Glass and Chemical Glassware Part 1. - Optical Glass. Paragraph 494, Tariff Act Of 1913. Paragraph 494. - Glass plates or disks, rough cut or unwrought, for use in the manufacture of optical instruments, spectacles, and eyeglasses, and suitable only for such use; provided, however, that such disks exceeding eight inches in diameter may be polished sufficiently to enable the character of the glass to be determined. (Free of duty. Act of 1913.) Summary. Description. Optical glass, rough cut or unwrought, is the essential element in the manufacture of microscopes, field glasses, range finders, gun sights, photographic lenses, and other optical instruments. It is admitted into the United States free of duty. Up to the end of the year 1917, this glass was not manufactured in the United States and had been imported in its unwrought state, principally from Germany, where many new varieties had been developed after years of scientific research and experiment. It has been imported also from France and England. Optical glass in a finished state and as part of completed optical instruments is also free of duty, when such instruments are imported by educational institutions for their own use. Development Of A New Industry. The shutting out of German imports and the necessities of the Allied Governments soon exhausted the supply of optical glass in the United States. In 1917 scientists of the Carnegie Institution and the United States Bureau of Standards cooperated with four American manufacturers and succeeded in producing certain varieties of optical glass which met the requirements of the Army and Navy. These manufacturers have built and equipped factories for the production of the optical glass required for domestic consumption. The quantity needed for this purpose is not large either in time of war or peace, but that the industry is essential was established by our experience in the war. In Germany, France, and England the industry has been expanded since 1914. Tariff Considerations. The advantages possessed by Germany and other countries are such that this new American industry is unequal to successful competition with the countries named on the basis of continued free importation of the foreign product. 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.
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