The demand for ironworkersa#39; coal was slow this afternoon, and house coal was little better than a drug. ... Walsall on Monday, Mr. Capper alleged that the ironworkers in South Staffordshire received only 3d. per ton in advance of the Northern .... thereby causing an equal expansion of boiler plates, and preventing incrustation on the interior parts of the boilers and tubes. ... The lamps used are the Swan incandescent, 20-candle power, and the system so far has worked very successfully.