In 1879 he was promoted to a professorship in physics but the was only a temporary position until it was confirmed as a permanent appointment in March 1901.
Sa 1879 siya ay itaas sa isang pagkapropesor sa physics ngunit ang noon ay lamang ng isang pansamantalang posisyon hanggang sa ito ay nakumpirma na bilang isang permanenteng appointment sa Marso 1901.