Show Calls for Tie Up As Parleys Lag NEW YORK May 17 INS INSA INSA INS INS- A virtual suspension of coal mining min mm- ing both ing-both both in the bituminous and anthracite fields throughout fields throughout the United States on Monday became a distinct possibility l late te Sat Satur Satur- r- r day Hopelessly deadlocked in contract contract contract con con- tract negotiations the United Mine Min Workers of America called for suspension of f operations throughout the anthracite region where about miners are employed Unless southern soft coal operators operators operators opera opera- tors agree to terms terms' of a contract already si signed ned by northern producers producers producers pro pro- John L L. L Lewis head of th the United Miners has threatened to call upward of men from the bituminous pits In a minute last-minute attempt to avert such a shutdown shutdown one one ne that would affect national defense in industries in- in William William H. H Davis of the federal mediation board intervened intervened intervened inter inter- Saturday afternoon He summoned representatives of both the miners and southern operators to meet with him Saturday night |