Thursday, February 6, 2014

Day 6

I missed yesterday so I'm doubling up. Power outages everywhere.

The banjo originated in Africa and up until the 1800s was considered an instrument only played by blacks.

 Jack Johnson (1878 – 1946), the first African–American heavyweight champion, patented a wrench in 1922.

 Engineer David Crosthwait, Jr. held 39 U.S. patents and 80 international patents pertaining to heating, refrigeration, temperature regulation and pump processes.
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