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IEEE Washington Section |
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Serving members in the District of Columbia and part of Maryland since 1903 |
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e S C A N N E R Calendar Index Technical Societies and Affinity Groups L I N K S |
HistoryThe 1910s: Building a FoundationSome abstracts have been found that seem representative of engineering in the early part of the century. Due to the era in which these abstracts were written, some words that are now not even mentioned were in fact the high point of the paper, such as the following: In an "electricity-copper wire table" dated 1911: Mercury resistance standards are sufficiently reproducible so that different labs agree to within 2 or 3 parts per 100,000. Wire standards are now so constant that a reference to mercury ohms need be made much less often. Or consider this description of antennas that is known today as radar. As described in Radio-Telegraphy Dampened and Undamped Oscillations (1912), an experiment was carried out between the Naval Academy at Annapolis, Maryland, and the Radiotelegraphic Laboratory in Washington, D.C. The antenna at Annapolis was approximately 150 feet high. The antenna at the Radiotelegraphic Laboratory was approximately 180 feet high at the top and 60 feet at the bottom. This way it was possible to calculate the ground absorption. The final calculation found 64 percent of the signal was lost over land. It made no difference whether the waves were dampened or moderately damped oscillations. |
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Send changes to Tim Weil at trweil@ieee.org or Elsie Grant at ncac-scanner@ieee.org. |
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