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• n  a toxic colorless flammable liquid organic base with a disagreeable odor; usually derived from coal

• Other suspect factors: "Ammonia, pyridine and pyridine derivative, cyanides and sulpho-cyanides, arsenic.
• The other ingredients in it, alcohol or pyridine, make it less drinkable and neutralize in part the poison effect.
• Tar contains dirt, of course, and poisons with terrific names like creosote, benzene, cyclohexane, anthracene, dianthracene, toluene, pyridine, amylene, methyl cyanide, carbon .