sentences:  He met at that time Santiago Ramón y Cajal, who convinced him to abandon law and study science.He graduated from the Universidad Central de Madrid (present day Complutense University of Madrid) in Physics and Mathematics, earning a doctorate in Physics in 1901 with thesis "Sobre la Variación Diurna de la Componente Horizontal del Viento" written under the supervision of Santiago Ramón y Cajal.He was an experimental physicist, and developed his interests mostly in the field of magnetic properties of matter, achieving a prominent position among the physicists of his era.