-1800 world population crosses one billion for the first time.
-1815 the first three verses of "Mary Had A Little Lamb" are written by John Roulstone after his classmate, Mary Sawyer, who came to school followed by her pet lamb.
-1838 the morse code is introduced by samuel morse..
-1848 The california Gold Rush begins!
-1853 the first jeans are made by levi strauss for the california gold miners!
-1879 thomas edison intents the incandescent lamp..
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