1. materials characteristic of baseball and the culture of baseball; 2. collectible baseball Americana
1965
President Lyndon B. Johnson joins 47,878 fans for the opening of the Astrodome in Houston, TX. The Astros win an exhibition with the Yankees 2-1 in 12 innings. Mickey Mantle hits the first-ever indoor home run in the new park.
1974
During a 12-0 win over the Astros, Phillies third baseman Mike Schmidt hits a ball off the public address speaker hanging from the Astrodome roof, 117 feet up and 300 feet from the plate. Alas, Schmidt must settle for a loud and large single.
