Philadelphia garbage collectors, prison guards and health center employes were among 19,000 city workers on strike yesterday in the nation's fourth-largest city.

National Guardsmen were working with fire department supervisors in Louisville, where 600 firefighters were on strike for the second straight day.

In New York, negotiators for the city and the 18,500-member Patrolmen's Benevolent Association recessed their labor contract talks after a 10-hour session.

The latest contract offer by officials in Memphis was rejected by a 9-to-1 ratio by police. Officials of the firemen's union postponed a vote on the offer.

Sedalia, Mo., police ended their one-day "sick-in" when a judge ordered them back to work.The 46 members of the force were protesting low pay.

The Philadelphia strike began at midnight Thursday and was sparked by a decision by the mayor to furlough as many as 3,500 workers to offset the cost of a $21 million contract awarded earlier to the city's 8,300 police officers.

In Louisville, where firefighters earn $11,085 a year for a 56-hour work week, settlement hinged on union demands for a wage increase.

New York's patrolmen, whose annual average base salary is $17,458, were demanding a $5,000-a-year raise that would bring them in line with their colleagues in suburban Nassau County.