Julian Leopold Ochorowicz (['juljan l?'?p?ld ?x?'r?vit??]; outside Poland also known as Julien Ochorowitz; Radzymin, 23 February 1850 – 1 May 1917, Warsaw) was a Polish philosopher, psychologist, inventor (precursor of radio and television), poet, publicist, and leading exponent of Polish Positivism.