A terrible explosion occurred at the Woon-soeket gas works, on the 31st ult, by which two men were shockingly burnt, and a portion of the works completely destroyed. There was a leakage of gas in the purifying house, and the watchmen incautiously went to the door with a lantern, and probably entered or were about to do so, when the gas ignited and a terrible explosion ensued. The building, which was of stone, was blown entirely to pieces.