On this day, May 6

1882 President Chester Alan Arthur signed the Chinese Exclusion Act, which barred Chinese immigrants from the U.S. for 10 years (Arthur had opposed an earlier version with a 20-year ban).

1937 Andrew W. Mellon dedicated the $10 million Mellon Institute at the start of a five-day program in Carnegie Music Hall, highlighted by an announcement of a new successful treatment for pneumonia developed by Institute scientists. Among the scores of leading scientists in attendance were three Nobel Prize winners — H.C. Urey, W.P. Murphy and Irving Langmuir.

1988 Popular Pittsburgh Mayor Richard S. Caliguiri died at the age of 56. Caliguiri devoted his entire career to the City of Pittsburgh, including service in the Department of Parks and Recreation, as president of City Council, and finally as mayor, winning two elections to that position. He was credited with bringing about Renaissance II.

2004 The University Club sold its 81-year-old building in Oakland to the University of Pittsburgh for $3.1 million.

Some items are from Stefan Lorant’s “Pittsburgh: The Story of an American City” (digital.library.pitt.edu/chronology).

— Compiled by Rick Nowlin Today’s birthdays: Baseball Hall of Famer Willie Mays, 89. Sen. Richard Shelby, R-Ala., 86. Rock singer Bob Seger, 75. Singer Jimmie Dale Gilmore, 75. Actor Alan Dale, 73. Former British Prime Minister Tony Blair, 67. TV personality Tom Bergeron, 65. Actress Roma Downey, 60. Actress Julianne Phillips, 60. Actor-director George Clooney, 59. Actress Geneva Carr (TV: “Bull”), 54. Actress Stacey Oristano, 41. Model/TV personality Tiffany Coyne, 38. Actress Adrianne Palicki, 37. Actress Gabourey Sidibe, 37. Actress Sasheer Zamata, 34. Rapper Meek Mill, 33.

Thought for today: “To know your ruling passion, examine your castles in the air.”

— Richard Whately, English clergyman (1787-1863)