Show Copper Sales Decline t Silver Price Advances PaW NEW YORI July 28 Sal AI-Sal s of cop copper r the last week were In inS S any week since early March but abet producers appeared d to welcome th reo re spIte and not the sign ot of prIce wa 55 observed and r I Mining r reports pott Further 81 51 tones aneel b been en made In the price Cf t tin In In London with wih a sympathetic gain lym In the dOmestic market strong pool l Is sa said to be supporting the London tin mark market t. t Little Lite change occurred In head Irad tn or by Zinc tin China moved higher r on buying |