Show 00 CEASE U S BANKS DEALING IN MARKS NEW YORK TORK sept Sept ept 14 The Tho German mark has sunk so Bo o low In in alu alue that American banks are aro giving up the task t of ot tryinG to compute Its it worth and nd lire are r begin beg nine betin-nine ning to strike It off ot their lists ll t of foreign l n exchange e The National City bank was wa the first tint major Wail Vall street treet tr ct to abandon all et- et effort tort t-tort fort to t Its Itu figure on foreign blue to the th rapidly shrinking pap r mark |