This Chapter Contains Section Title: Histamine Content of Various Nerves Relationship of Histamine Content in Nerve and Organ Histamine in Organs After Sympathetic Nerve Section Correlation Between Histamine and Noradrenaline Content in Nerves Release of Histamine from Nerves in Vitro Lack of Evidence for Release of Histamine from Sympathetic Nerves in Vivo Nature of Histamine-Like Substance in Nerves Histamine in Nerves and Histaminergic Nerves References