The city's Council for the Arts is sponsoring a show tomorrow about the artist Vincent Van Gogh. The slide and music show begins at 8 p.m. at Gaithersburg High School. Klaas Hofstra, the featured performer, also wrote the show.

Tickets are $6.50 for adults and $5 for children, students and senior citizens. For more information, call 258-6310. NORTH POTOMAC

The U.S. Census Bureau recently named North Potomac a "census-designated place," a distinction shared by other incorporated areas such as Wheaton and Germantown.

In order to be a "census-designated" place, an area must be known locally by a name and have a population of at least 2,500.

Civic activists believe the new designation for the unincorporated area will help the community to get facilities such as a public library.

The Census Bureau defines North Potomac as being encompassed roughly by Route 28 on the north, Jones Lane on the west, Turkey Foot Road to the southeast and Travilah Road to the southwest.

The North Potomac Citizens Association estimates the area's population at 18,000. Census figures will not be available until next year.

In August 1989, the U.S. Postal Service began recognizing North Potomac as a postal designation, allowing residents to use North Potomac as a mailing address. Most North Potomac residents still use a Gaithersburg zip code and are served by the Gaithersburg post office. CITY OF ROCKVILLE

The city's Animal Control Board has ordered the three Rottweilers that mauled a Rockville mother and child last month be separated and placed in homes outside the city.

The three-member board, which had been urged by some residents and the victims' family to order the animals killed, also ruled that the family that owns the dogs be barred from keeping other dogs at their home.

The decision, which came in a contentious meeting Oct. 2, followed the episode in Rockville's North Farm neighborhood last month when Arlynn Joffe, 39, and her three-year-old son, Brett, were mauled by the three dogs while walking along Green Pasture Drive. On Sept. 18, city officials seized the dogs from the owner, Hagit Levin, and transferred them to an undisclosed kennel in Montgomery County. Joffe was hospitalized for three days and required 150 stiches for wounds to her legs. Her son suffered minor injuries.

The agreement declares the dogs dangerous, which means they could be required to be muzzled or confined, and banned them from inside the city limits.

According to the family, one of the dogs, Caesar, is to be sent to Levin's family in Israel; another dog named Bear is to go to a 400-acre farm in Howard County, and Lear, the mother of the other two dogs, will be sent to a home with four-acres at an undisclosed site in Maryland.