Casimiro del Rosario

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Casimiro V. del Rosario (June 13, 1896-September 15, 1982) is a foremost Filipino physicist, meteorologist, and astronomer.


Career and Contributions

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 others. His works have been published in international journals such as the American Physics Review and the Journal of Franklin Institute.

He is the co-founder of the Bartol Research Foundation in Philadelphia, an institution which did pioneering researches in physics.

Dr. del Rosario was the recipient of a Presidential Award in 1965 for his contributions to physics. He was made Director of the Philippine Weather Bureau for 11 years, and the first vice-chairman of the National Science Development Board in 1958. He was conferred as a National Scientist in 1984.


  • BS Civil Engineering, with honors - University of the Philippines, 1918
  • MS in Physics - Yale University, USA, 1924
  • Ph.D. in Physics - University of Pennsylvania, USA, 1932


  • Gorgonio, Luis (1998). The Filipino Scientists. Loacan Publishing House: Manila.
  • National Academy of Science and Technology (2000). National Scientists of the Philippines (1978-1998). Anvil Publishing, Inc: Pasig City.



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