Walnut cake, after expressing out the oil from the kernels, is a good food for cattle, these kernels being the crumpled cotyledons or seed leaves. They contain oil, mucilage, albumen, mineral matter, cellulose, and water.
The rook has a most abiding affection for Walnuts. As soon as there is any fruit on the trees worth eating, this bird finds it out, and brings it to the ground, choosing only those nuts which are soft enough for him to penetrate.
Ovid has left a charming little poem, Nucis Elegia—the plaint of the Walnut tree—because beaten with sticks and pelted with stones, in return for the generosity with which it bestows on mankind its fair produce.
A valuable medicinal Spirit is distilled by druggists from the fruit of the Walnut. It is an admirable remedy for spasmodic indigestion, and to relieve the morning sickness of pregnancy. A teaspoonful of the spirit (Spiritus nucis juglandis) may be given with half a wine-glassful of water every hour or two, for most forms of sickness, and the dose may be increased if necessary.
"Nucin," or "juglon," is the active chemical principle of the several parts of the tree and its fruit.
The leaves, when slightly rubbed, emit a rich aromatic odour, which renders them proof against the attacks of insects. Qualities of this odoriferous sort commended the tree to King Solomon, whose "garden of nuts" was clearly one of Walnuts, according to the Hebrew word eghoz. The longevity of the tree is very great. There is at Balaclava, in the Crimea, a Walnut tree believed to be a thousand years old.
[601] The shade of the Walnut tree was held by the Romans to be baneful, but the nuts were thought propitious, and favourable to marriage as a symbol of fecundity. The ceremony of throwing nuts, for which boys scrambled at a wedding, was of Athenian origin:—
"Let the air with Hymen ring
Hymen! Io! Hymen sing!
Soon the nuts will now be flung:
Soon the wanton verses sung."
—Catullus.
In Italy this is known as the "Witches tree." It is hostile to the oak.
The leaves of the American Black Walnut tree, which grows naturally in Virginia, are of the highest curative value for scrofulous diseases and for strumous eruptions. Chronic, indolent sores have been healed by these after every other remedy has failed. The parts should be washed several times a day with a strong decoction of the leaves, and an infusion of the same should be taken internally; also of the extract made from the leaves, four grains in a pill each night and morning. For such purposes the leaves of our English Walnut are almost equally efficacious. To make an infusion one ounce should be used to twelve ounces of boiling water. For a syrup mix eight grains of the extract with an ounce of simple syrup: and give one teaspoonful of this twice a day with water. Also apply to any sore some of the powdered leaves on lint soaked in the decoction. For scrofulous joints, or glands, this treatment is invaluable. A green English Walnut, boiled in syrup and preserved in the same, is an excellent homely remedy for constipation. It will be noticed that the fruit becomes black by boiling. The Chinese put the raw kernels into their tea to give it a flavour.