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The histochemistry of the pineal gland of the domestic fowl.

Since reproductive activity in the domestic fowl is particularly sensitive to light and the function of its pineal gland is thought to be associated with both reproductive development (Shellabarger, 1953) and light (Axelrod, Wurtman & Winget, 1964), the pineal ofthis bird is potentially important. However, the physiological significance of the gland is far from fully understood and in many other respects knowledge of it is meagre. There have, for example, been relatively few histochemical investigations although these may form an important link between structure and function.