Joseph Priestley (24 Maarso [O.S. 13 Maarso] 1733 <unk> 6 Febraayo 1804) wuxuu ahaa 18th-century English Separatist theologian, natural philosopher, chemist, innovative grammarian, multi-subject educator, and liberal political theorist who published over 150 works. Waxaa taariikh ahaan loo aqoonsan yahay inuu helay oksijiinta, isagoo ku go'doomiyay xaaladdiisa gaaska, in kasta oo Carl Wilhelm Scheele iyo Antoine Lavoisier ay sidoo kale sheeganayaan dalabyo xoog leh oo ku saabsan daahfurka. Inta uu noolaa, sumcadda sayniska ee Priestley waxay ku tiirsanayd soo saaristiisa biyaha soodhada, qoraalladiisa ku saabsan korontada, iyo soo saaristiisa dhowr "hawo" (gaas), Priestley ugu caansan waxaa lagu magacaabay "dephlogistic air" (oxygenated air). Si kastaba ha noqotee, go'aanka Priestley ee difaaca fikradaha kiimikada iyo waxa ugu dambeyntii ka tagay Joseph Priestley.
18aad ee qarnigii Ingiriiska Separatist fiqiga, falsafada dabiiciga ah, kiimikada, naxwaha hal abuur leh, macalinka maadooyinka badan, iyo aragtida siyaasadeed ee xor ah oo daabacay in ka badan 150 shaqo