First cork-centered baseball...

SCIENTIFIC AMERICAN, New York, June 26, 1909  The front page has two graphics relarging the huge size of the "Zeppelin II" with a related article inside. Another page has5 photos of: "The Latest Frenh & German Aeroplanes and Airships" with a related article.
Under the lengthy: "Index of Inventions" near the back is an inconspicuous entry for a patent issued for: "Base ball. B.F. Shibe...#924696" which was for the first cork-centered baseball, issued to Ben Shibe. A notable item in the evolution of baseball equipment. Its World Series debut occurred in 1910.
Complete in 20 pages.