Template:Selected anniversaries/April 13: Difference between revisions

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||1879: Francesco Severi born ... mathematician. Pic.
||1879: Francesco Severi born ... mathematician. Pic.


File:Herbert Osborn Yardley.jpg|link=Herbert Yardley (nonfiction)|1889: Cryptologist and author [[Herbert Yardley (nonfiction)|Herbert Yardley]] born.  
File:Herbert Osborn Yardley.jpg|link=Herbert Yardley (nonfiction)|1889: Cryptologist and author [[Herbert Yardley (nonfiction)|Herbert Yardley]] born. Yardley founded and led the Black Chamber, a secret American government cryptographic organization which broke Japanese diplomatic codes, furnishing American negotiators with significant information during the Washington Naval Conference of 1921-1922.  


||1892: Robert Watson-Watt born ... engineer, invented Radar. Pic.
||1892: Robert Watson-Watt born ... engineer, invented Radar. Pic.

Revision as of 10:48, 13 April 2020