Most Dangerous Poisons. The most dangerous of all poison are the toxins of Infectious disease! the next most dangwrous are the toxins of fatigue. Work, whether of muscles mus-cles or nerves, produces waste products, prod-ucts, "ashes" which are poisonous, the so-called fatigue toxins. When these toxins have piled up In our blood to a certain pitch we feel tired, so that fatigue Is a form of self-poisoning. When we quit, work or sleep or take food these poisons are neutralized or burnt up in the system or washed and 1 breathed out of It.