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This is what one of our English books says of them: 'When the acorn itself is wounded, it becomes a kind of monstrosity, and remains on the stalk like an irregularly-shaped ball. It is called a "nut-gall," and is found principally on a small oak, a native of the southern and central parts of Europe.
After the operation of emetics, cream of tartar is also considered of great use, as also oxymuriatic acid, infusions of nut-gall, oak bark; warm spices are considered also of use, for they may separate some part of the deleterious matter, as is shown by their effect when mixed with decoction of these plants; acerb and astringent wines are also of great use. AETHUSA Cynapium.
Now arises the question, are these microzymes the results of Homogenesis, or of Xenogenesis? are they capable, like the Toruloe of yeast, of arising only by the development of pre-existing germs? or may they be, like the constituents of a nut-gall, the results of a modification and individualisation of the tissues of the body in which they are found, resulting from the operation of certain conditions?
Gallic acid is one of the ingredients used in dyeing stuffs and cloths, and therefore the supply yielded by the nut-gall is highly welcome. The nut-galls are carefully collected from the small oak on which they are found, the Pyreneean oak. It is easily known by the dense covering of down on the young leaves, that appear some weeks later than the leaves of the common oak.
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