Read it through once

Poisoned arrows--Fish poisons--Manchineel--Curare--A wonderful story--Antiaris--Ordeals--The Obi poison--Oracles produced by poisons--Plants which make horses crazy and others that remove their hair--Australian sheep and the Caustic Creeper--Swelled head--Madness by the Darling Pea--Wild and tame animals, how they know poisons--How do they tell one another?--The Yew tree, when is it, and when is it not poisonous? 226