Show anesthetics long known lecturing before the association of surgeons of munch on narcotics prof klein said that the process of reducing the sensibilities of patients pat lenta with a view to making operations painless was known and practiced in tho the middle ages bashop theodorus Thoo dorus of Cher vlra vira wrote a prescription for a pain destroyer in the twelfth century which contained opium morphine and X A medical work printed in 1460 contains the first known treatise on inhalation and men now inject under the skin the soothing mixture which lu 1460 was inhaled |