City Marks 350th Birthday  The fireworks were louder and more
spectacular, the parade longer and the smiles larger than ever
before in Cambridge as the city celebrated its 350th birthday
this weekend.  A three-hour parade snaked through the streets of
the city from Lechmere Square to Boylston Street yesterday,
mixing politics with ethnic pride and martial music.  Saturday's
celebration began with a reenactment of the city's founding in
1630 and ended with a 12-inch shell exploding over the Charles
to cap a half-hour of fireworks set to music.  "It was
wonderful, really wonderful--worth all the effort," Mary Ellen
Fitzgerald, coordinator of the 350th celebration, said yesterday
as she stood on trash-lined Boylston St. following the parade.
"It couldn't have gone any better."  Fitzgerald's reaction was
typical of city leaders, who watched the parade from a Winthrop
Square reviewing stand after they walked the three-mile route.
"Fine, fine day for a parade," Kevin Crane '73 said as he
watched the Cambridge Rindg