The U.S. dollar was mostly lower in European trading Friday. Gold was lower, REPORTED AP. The euro traded at US$1.3781, down from US$1.3797 late Thursday. Other dollar rates: _122.28 Japanese yen, down from 122.41 _1.2026 Swiss francs, down from 1.2037 _1.0468 Canadian dollars, down from 1.0469 The British pound traded at US$2.0331, up from US$2.0304. Gold traded in London at US$667.50 per troy ounce, down from US$667.60 late Thursday. In Zurich, gold traded at US$665.45 per troy ounce, down from US$666.75. Gold rose US$3.50 in Hong Kong to US$667.65. Silver traded in London at US$13.06 per troy ounce, up from US$13.04.