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Store Large Amounts: The Leyden jar, invented in 1745 by Pieter van Musschenbroek, was the first device that could store large amounts of electric charge.
Thomas Edison invented both the
structed the first central power station and distribution system in New York in 1881.
A similar rather common development, attributable to substantial variations in local competition and to larger average size of stores, is the upgrading of the job of store manager. Once regarded as a mere operating and personnel manager of the store unit, he now frequently has a much wider range of responsibility, more freedom to adapt his store to local conditions, and merchandising responsibility for much larger sales volume than was traditionally the situation among large, centrally managed chains.
Needless to say, there is also great concern about the tremendous amounts of radioactivity produced in atomic bomb blasts. Fortunately, a large variety of valuable uses of radioactive substances involve harmless quantities and the methods of shielding against harmful amounts are well understood. |
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