Template:On This Day (nonfiction)/March 30

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  1599: Mathematician Adam Ries dies. Reis wrote textbooks for practical mathematics, promoting the advantages of Arabic/Indian numerals over Roman numerals.

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  1606: Mathematician and astronomer Vincentio Reinieri born. Reinieri revised and finished the work of Galileo, who before his death placed all of the papers containing his observations and calculations in Reinieri's hands.

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  1811: Chemist and academic Robert Bunsen born. Bunsen will investigate emission spectra of heated elements, and discover caesium (in 1860) and rubidium (in 1861) with the physicist Gustav Kirchhoff.

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  1886: Mathematician, philosopher, and logician Stanisław Leśniewski born. Leśniewski will posit three nested formal systems, to which he will give the Greek-derived names of protothetic, ontology, and mereology.

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  1892: Mathematician and academic Stefan Banach born. Banach will be one of the founders of modern functional analysis.

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  1944: Physicist Charles Vernon Boys dies. Boys achieved recognition as a scientist for his invention of the fused quartz fiber torsion balance, which allowed him to measure extremely small forces, and is remembered for his careful and innovative experimental work.

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  1995: Mathematician, physicist, and academic John Lighton Synge dies. Synge was a prolific author and influential mentor, and is credited with the introduction of a new geometrical approach to the theory of relativity.