* Silver hits highest level since February (Updates prices) May 18 (Reuters) - Gold hit nearly a four-month peak on Tuesday before easing slightly as yields on U.S. Treasuries inched higher, with a weaker dollar and inflation fears maintaining a floor under bullion prices. Spot gold was up 0.1% to $1,868.57 per ounce by 1:47 p.m. EDT (1747 GMT) after hitting its highest level since Jan. 29 earlier in the session. U.S. gold futures settled at $1,868, largely unchanged from Monday. “Yields just picked up just a notch,” said Phillip Streible, chief market strategist at Blue Line Futures in Chicago. “The weaker dollar has provided most of the support. (But) gold has had a pretty good run, but it’s not in a bullish market at all.”