<prompt> Sample of spinal cord is preserved in suspected poisoning withArsenicStrychnineAlcoholOleander  <response>: Preservation of viscera: In ceain cases of poisoning, the following are preserved. 1 Hea: strychnine, digitalis, yellow oleander. 2 Brain: 100 gm. of cerebrum or cerebellum: alkaloids, organophosphorus compounds, opiates, CO, cyanide, strychnine, barbituratesanaesthetics and volatile organic poisons. 3 Spinal cord entire length: strychnine and gelsemium. 4 C.S.F.: alcohol. 5 Bile: It is best removed by puncturing the gall bladder in situ. Narcotic drugs, cocaine, methadone, glutathione, barbiturates and some tranquilisers. 6 Vitreous humour: alcohol, chloroform, cocaine, morphine, tricyclic antidepressants, etc. 7 Lung: one lung in gaseous poisons, hydrocyanic acid, alcohol, chloroform. Ref:- k s narayan reddy; pg num:-125 