... South Wales Coal Trade. SLIDING SCALE AUDIT. Advance of 5 pep Cent. A meeting of the Sliding Scale Joint Committer was held at the Institute of Engineers, Cardiff, on Tuesday morning, when tha commitl received the audit of the colliery books, which awarded a. 5 per cent. advanca in wages. This Srinas the rate to S354 above the standard of 1879. WOlvKIXG OF THE SCALE: PREVIOUS AUDITS ...