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MVSNYCdean- i thought the whole "ball bouncing over the fence" rule was changed much earlier than 1933, but i did some quick research on the interent and here is what i found...
"Prior to the 1930 American League season, and prior to the 1931 National League season, fly balls that bounced over or through the outfield fence were home runs! All batted balls that cleared or went through the fence on the fly or that were hit more than 250 feet in the air and cleared or went through the fence after a bounce in fair territory were counted as home runs. After the rule change the batter was awarded second base and these were called "automatic doubles" (ground-rule doubles are ballpark-specific rules) and are covered by rule 6.09(d)-(h) in the MLB Rule Book.
***Babe Ruth reportedly had no "bounce" home runs; Lou Gehrig had a few, so did Rogers Hornsby and many, many other players of that era."