File:Early cork center baseball schematic from Evolution of the Ball.png
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 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
| Description | Cross-section illustration of an early cork baseball from the article "Evolution of the Ball". |
| Date | circa 1963 |
| Source | Google Books - Rawlings Sporting Goods Company Staff (1963-07). "Evolution of the Ball". Baseball Digest: 69. |
| Author | Unknown author |
| Permission (Reusing this file) |
see File:Evolution of the Ball, Baseball Digest July 1963.djvu |
Original caption:
The cork center baseball was introduced in 1910. The new "live" ball led pitchers to develop a number of freak deliveries, most of which were outlawed in 1920.
Licensing
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This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
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Baseball Digest: This image or file was extracted from an issue of Baseball Digest published before January 1, 1964. A search of the following sources:
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 07:06, 29 September 2009 | | 548 × 550 (166 KB) | Struthious Bandersnatch | {{Information |Description=Cross-section illustration of an early cork baseball from the article "Evolution of the Ball". |Source=Google Books - {{cite journal | title = Evolution of the Ba |
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