This Day in History: April 10
- 879 - Louis III becomes King of West Francia
- 1407 - Lama Deshin Shekpa visits the Ming Dynasty capital at Nanjing and is awarded the title Great Treasure Prince of Dharma
- 1790 - Robert Gray is the 1st American to circumnavigate the Earth
- 1825 - 1st hotel in Hawaii opens
- 1866 - American Society for the Prevention of Cruelty to Animals (ASPCA) is founded in New York City
- 1869 - Congress increases number of Supreme Court judges from 7 to 9
- 1874 - The first Arbor Day is celebrated in Nebraska
- 1912 - RMS Titanic sets sail from Southampton for her maiden (and final) voyage
- 1955 - Dr Jonas Salk successfully tests Polio vaccine
- 1960 - Senate passes landmark Civil Rights Bill
- 1872 - 1st National black convention meets in New Orleans
- 1995 - New York City bans smoking in all restaurants that seat 35 or more
- 1998 - The Belfast Agreement is signed (also called the Good Friday Agreement)
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