Ether in oil was used for rectal anaesthesia. Rectal anaesthesia offered a way to administer anaesthesia when using a mask was impractical, such as oral or respiratory tract surgery. Undiluted ether was irritating to the bowel and even proved to be fatal. Ether in oil, developed in 1913, minimized irritation with no reported deaths.Empty clear glass bottle with cork stopper which has become dislodged and is now inside the bottle. The bottle has a white label with handwriting on the front. The bottle has been decanted.Handwritten in ink: Ether in Oil / = parts Stamped in red ink on top left corner of label: CAU... [faded and almost indecipherable]ether, ether in oil, rectal administration, anaesthesia