He studied the problems in some textile fibres and in 1913 he invented a machine for making cotton fibres that was a revolution in the cotton industry.
He was Professor of mathematical analysis at the Escola d’Enginyers Industrials de Barcelona, where he was also the director from 1913 to 1932.
Professor of calculus in the engineer school of Barcelona since 1891. In 1909 he became Professor of mathematics. In some of his works he tried to find a relation between mathematics and music.
He was born in Torroella de Montgrí on December 1, 1812, the son of Jaume Giró and Úrsula Aranols. The couple lived in Torroella, where their father worked as a tailor, and later the whole family moved to Figueres, their mother’s hometown, where Andreu studied primary and secondary education.
He studied in the Junta de Comercio and he was one of the members of the first industrial engineers promotion.
He studied in Charlottenburg (Berlin), Barcelona and Madrid. He got his Ph.D. degree in physics and he was teacher at the universities of Zaragoza, Barcelona and Madrid. He specialised in physics-mathematics sciences and published several essays about these matters including “Emisión de radiaciones por cuerpos fijos o en movimiento”, read in the Acadèmia de Ciències i Arts de Barcelona in 1909. He published some works in “Revista de la Academia de Ciencias”, Madrid, and in the bulletin of Institut de Ciències de Barcelona.