<prompt> Stages of Anaesthesia were established by :EtherNitrous OxideCyclopropaneChloroform  <response>: Ans. is a Ether Guedels staging of Anaesthesia was given for EtherStage of Anaesthesia are as followsStage I - AnalgesiaStage II - Delirium or excitement, partially dilated pupilStage III - Stage of Surgical AnaesthesiaIt is divided in 4 stagesMoving eye to fixed eyeCorneal laryngeal reflex lostLight reflex lostIntercostal paralysis, Abdominal respiration, Pupils widely dilatedStage IV - Stage of Medullary Paralysis 