Fascinating tidbits from the Census Bureau's 1962 County and City Data Book (705 pp.; $5-25):
> MOST DENSELY POPULATED CITY: Union City, N.J., with 40,138 people per sq. mi. Next: Hoboken, N.J. with 37,262. New York City has only 24,697although one of its boroughs, Manhattan, jams 77,195 into each square mile.
> LEAST DENSELY POPULATED CITY: Hilo, Hawaii, with 89 per sq. mi. Next: Oak Ridge. Tenn., with 316.
> WEALTHIEST CITY: Shaker Heights (pop. 36,460), near Cleveland, with a median family annual income* of $13,933. Second: suburban Wilmette, on the North Shore...