Show UI u. Si S. to fo Mediate Strike on S. S S P. P P SAN FRANCISCO Dec 9 INS Hopes of averting a state seven-state strike against the Southern Pacific Pacific Pacific Pa Pa- railroad mounted Thursday as the federal government prepared prepared prepared pre pre- pared to intervene Mediator William F. F Mitchell is scheduled to arrive in San Francisco Francisco Francisco Fran Fran- cisco from Washington Friday for foran foran foran an attempt to work out a settlement settlement settlement settle settle- ment between the railroad and the Brotherhood of Locomotive l Firemen Firemen Fire Fire- men and The brotherhood has set next Wednesday at 6 am a.m. as the hour for the launching of a strike t that at atwould would tie up main and commuter Southern Pacific lines in California California Cali- Cali fornia ornia Oregon Nevada Arizona New Mexico Utah and Texas The threat of a walkout stems from rom a controversy over nearly grievances that have accumulated accumulated since 1940 The brotherhoods brotherhood's western general general general gen gen- eral chairman C C. W W. Moffitt said that hat if Mitchell shows any signs of making headway after he arrives arrives arrives ar ar- rives we will postpone the strike date for a reasonable period |