Was Leonardo a Chemist? This work was supported by the Ministry of Education and Cultura (D.G.I.C.Y.T., grant PB98-0997). I am grateful to the Britannica Center, Chicago, for kindly providing further information on the biographies and scientific contributions of Leonardo da Vinci.
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Departamento de Química Orgánica Facultad de Ciencias Universidad de Extremadura 06071 Badajoz (Spain).