Appearing with the director of research at the Quaker Oats Co., Stare said that the chart failed to evaluate the cereals "the way 95 per cent of breakfast cereals are consumed, that is, with milk."

Mayer, who served as chairman of the White House Conference on Food, Nutrition, and Health last December, disagreed the next day and called for restrictions on cereal advertising by the Food and Drug Administration (FDA) and the Federal Communications Commission.

In a letter to the subcommittee, Mayer suggested that food advertising might be monitored by an impartial committee of nutritionists, doctors, and educators.

More Rioting

Harvard Square became a scarred battleground this summer as Cambridge youths trashed store windows and skirmished with police on several separate occasions.

The disturbances led to a crackdown on street people in the area and turned Harvard Square into the most polarized neighborhood in the city.

On the night of July 25, a group of 200 caused minor property damage in the Square before police from Cambridge, Boston, and the Metropolitan District dispersed them with nightsticks and tear gas.

Following the incident, the Cambridge City Council imposed a 9 p. m. to 8 a. m. curfew on Cambridge Common to prevent groups from gathering or sleeping there.

Ten days later, a crowd of 100 gathered for a planned "block party" on the Common at 9 p. m. For two hours, nothing happened until 25 of them charged into the Square and were routed by 60 city police.

On both occasions, police moved through Harvard Yard to outflank the youths. City officials had warned the University beforehand that police would use the Yard "if necessary," and told police to do so without further notification to Harvard.

Then, on September 4, 50 police cordoned off the Square and raided the Common, arresting 20 youths on drug and disorderly conduct charges. Officials said that federal narcotics agents had been watching the area for several weeks and participated in the raid.

The Square's merchants, badly shaken by three trashing episodes since last Spring, met after the first disturbance and "asked police to start redressing the balance to some extent," as Alexander Zavelle, manager of the Coop and spokesman for the merchants put it.

Some stores have been hit very hard by the trashing; Saks Fifth Avenue, for example, was closed for a week after the July 25 incident and has suffered $40,000 damage since the Spring.