The following were among actions taken at Tuesday's meeting of the Montgomery County Council. For more information, call 251-7900.

PRISON FUNDING -- The council, citing a recent jump in the Montgomery County jail population, approved $615,000 in supplemental funds for salaries and operating costs associated with the increase.

According to a memorandum prepared by the council staff, the inmate population at the county detention center rose from 450 in September to 550 in November last year. On Tuesday, prison officials reported that the figure was down to 516 inmates. From January to September last year, the prison population fluctuated between 450 and 460, the memo stated.

In order to provide adequate jail staffing, the county Department of Correction and Rehabilitation instituted a policy of mandatory overtime. The council has appropriated $152,770 to pay the wages of those who work six-day work weeks in the overtime program. Also, $97,150 is earmarked to help pay the salaries of additional correctional officers, a move that is intended to reduce the inmate-to-officer ratio to 4.7 to 1.

The unanticipated increase in the inmate population also has increased the general operating expenses for food, inmate care and general maintenance.

SOLID WASTE COMMITTEE -- The council confirmed five appointments made by County Executive Sidney Kramer to the 15-member Solid Waste Advisory Committee.

The panel, which is composed of county residents and representatives of the business community and the solid waste industry, serves as an advisory group to the council on all matters relating to solid waste management in the county. Members of the committee are not paid.

The council confirmed Joan G. Lefler of Silver Spring and Norman G. Paulhus of Derwood, both of whom are currently on the committee; Edmond M. Piesen of Silver Spring; Edward A. Helme of Washington Grove; and Joan S. Banfield of Rockville, who served on the panel in the 1970s.

ART IN PUBLIC PLACES -- The council approved two new projects for libraries under its art in public places program. The program requires an additional appropriation of at least 1 percent of the estimated construction cost of certain capital projects to be set aside for works of art.

The council approved two wood sculptures at a cost of $4,300 for the Wheaton Library and an $800 watercolor painting for the Davis Library in Bethesda.