Show Copper Holds Lead Goes Up Prices Copper held at 44 44 4 1 1 and zinc at 14 per pound Asarco and US U.S. Smelting Smelting Smelting Smelt Smelt- ing boosted the price of lead by 2 l 1 to 14 2 1 per pound on April 7 7 Silver dropped from to per ounce and gold advanced from to per ounce The United Park City Mines Company shipped 43 cars of ore from April 7 through April 11 via the Park City Union Pacific Depot The Department of the In Interior Interior Interior In- In has extended to May 1 I Ithe the period during which comments comments comments com com- ments may be filed on the federal metal and mine safety standards to be published published published pub pub- in proposed form forin on January January January Jan Jan- uary 16 1970 The Utah Mining Associations Association's Safety Committee has sup supplied p Ii e d comprehensive comments on the open pit and underground proposed stand stand- ards |