On June 13, 1896, Casimiro V. del Rosario, recognized in 1984 as National Scientist in physics, astronomy and meteorology, was born in Bantayan,
Cebu.
Dr. Del Rosario is known for his researches on ultraviolet light of different wavelengths, effect of radioactive radiation on Euglena, high voltage electrical discharges in a vacuum, and many other accomplishments.
He finished BS in
Civil Engineering with honors at the University of the Philippines in 1918; MS in Physics at Yale University in the United States in 1924; and PhD in Physics at the University of Pennsylvania in 1932.
Notably, Del Rosario was the co-founder of the Bartol Research Foundation in Philadelphia, an institution which did pioneering researches in physics.
Aside from researching and experimenting, he also headed the Philippine Weather Bureau for 11 years and was vice chair for the National Science Development Board.
He was given the Presidential Award in 1965 for his outstanding works in physics, meteorology and astronomy.
He died on September 15, 1982 at the age of 86.
Also on this same day in 1899, the Battle of Zapote River, also known as the Battle of Zapote Bridge, took place between 3,000 Americans and 5,000 Filipinos. It was the second largest battle of the Philippine-American War.
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