Return Today in the History of  Science, Math, Invention & Technology Return

APRIL 15

1707 Leonhard Euler (Swiss Mathematician, Physicist) Leonhard Euler Mathematics
1786 Walter Channing (Rhode Island-born Physician; Pioneer in the Use of Anesthetics) Rhode Island Scientists and Mathematicians Health Care
1874 Johannes Stark (German-born 1919 Nobel Laureate for Physicist) German Scientists & Mathematicians Physics 1919 Nobel  Laureate for Physicist
1880 Max Wertheimer (Czech-American Psychologist; Founder of Gestalt Psychology) Czech Scientists & Mathematicians Psychology
1896 May Edward Chinn (Massachusetts-born African-American, Native-American Physician in New York City) Massachusetts Scientists and Mathematicians New York Scientists and Mathematicians Medical Professionals African American Scientists and Mathematicians Native American Scientists and Mathematicians African American Registry
1907 Nikolaas Tinbergen (Dutch-English Zoologist and Ethologist; 1973 Nobel Laureate for Physiology or Medicine) Dutch Scientists & Mathematicians 1973 Nobel  Laureate for Physicist
Deaths
Persons of Historic Significance Who Have Died on This Date
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1861 Abraham Lincoln Issues Proclamation Calling for 75,000 Militia and Convening Congress Abraham Lincoln U.S. Congress American Civil War New York Times Lincoln Log
1876 The First Telegraph Line in Northern Wisconsin Is Completed Near Ashland Ashland, Wisconsin The Telegraph Historic Firsts Wisconsin Historical Society
1888 Spokane, Washington's First Streetcar Takes Its Inaugural Trip Spokane, Washington Transportation Historic Firsts History Link
1896 Henry Flagler's First Train Arrives in Miami, Florida Carrying Building Materials Miami, Florida Henry Flagler Railroad Historic Firsts Florida Historical Society
1912 The Titanic Sinks in North Atlantic off Coast of Newfoundland The Titanic Naval History Death History Link History Channel New York Times Center for the Study of Technology and Society University of Georgia Wisconsin Historical Society
South Africa's First National Weather Forecast Is Issued South Africa Meteorology Historic Firsts South African History
The Schoolchildren of St. Paul, Minnesota Select the Sweet Pea as the City's Official Flower in an Election Sponsored by the City's Women's Clubs St. Paul, Minnesota Education Botany Elections Minnesota Historical Society
1952 The YB-52 Prototype for the Boeing B-52 Stratofortress Takes Its First Flight Seattle, Washington Aviation Military History Historic Firsts History Link
1956 An F4 Tornado Travels 20 Miles Through Jefferson County, Alabama, Killing 25 People, Injuring 200 and Destroying or Damaging More Than 350 Homes Jefferson County, Alabama Tornado Death Alabama State Archive
1965 In Virginia, the Chesapeake Bay Bridge-Tunnel Opens Virginia Bridges Chesapeake Bay Bridge-Tunnel History Channel Virginia Historical Society
1975 First Whale-Watching Excursion on the Eastern Seaboard Departs from Massachusetts's Provincetown Harbor Provincetown, Massachusetts Whales Historic Firsts Massachusetts Foundation for the Humanities
1979 In Yugoslavia, a 6.9 Magnitude Earthquake Kills At Least 121 People, Injuring More Than 1,000 and Leaving 100,000 Homeless Yugoslavia Earthquake Death USGS
1999 Three Planets Are Found Orbiting the Star Upsilon Andromedae Cosmology The Solar System NASA

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