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---History---Balm, Baulm or Bawm, contracted from Balsam, may be derived from the Hebrew bot smin, 'chief of oils,' or bâsâm, 'balm,' and besem, 'a sweet smell.' Opobalsamum is used by Dioscorides to mean 'the juice flowing from the balsam-tree.'
Pliny states that the tree was first brought to Rome by the generals of Vespasian, while Josephus relates that it was taken from Arabia to Judea by the Queen of Sheba as a present to Solomon. There, being cultivated for its juice, particularly on Mount Gilead, it acquired its popular name. Later, it was called Opobalsamum, its dried twigs Xylobalsamum, and its dried fruit Carpobalsamum.
Its rarity, combined with the magic of its name, have caused the latter to be adopted for several other species.
Abd-Allatif, a Damascan physician of the twelfth century, noted that it had two barks the outer reddish and thin, the inner green and thick, and a very aromatic odour.
The juice exudes spontaneously during the heat of summer, in resinous drops, the process being helped by incisions in the bark. The more humid the air, the greater the quantity collected. When the oil is separated, it is prepared with great secrecy, and taken to the stores of the ruler, where it is carefully guarded. The quantity of oil obtained is roughly one-tenth the amount of juice. It is probable that an inferior kind of oil is obtained after boiling the leaves and wood with water.
The wood is found in small pieces, several kinds being known commercially, but it rapidly loses its odour.
The fruit is reddish grey, and the size of a small pea, with an agreeable and aromatic taste.
In Europe and America it is so seldom found in a pure state that its use is entirely discontinued .
---Constituents---The liquid balm is turbid whitish, thick, grey and odorous, and becomes solid by exposure. It contains a resin soluble in alcohol, and a principle resembling Bassorin.
---Medicinal Action and Uses---It has been used in diseases of the urinary tracts, but is said to possess no medicinal properties not found in other balsams.
Populus Candicans is called Balm of Gilead in America. The buds are used, and called Balm of Gilead Buds, as are those of P. Nigra and P. balsamifera, the product of the last being imported into Europe under the name of Tacomahaca. They are covered with a fragrant, resinous matter, which may be separated in boiling water, the odour being like incense, and the taste bitter and rather unpleasant. They are stimulant, tonic, diuretic, and antiscorbutic. A tincture of them is useful for complaints of the chest, stomach, and kidneys, and for rheumatism and scurvy. With lard or oil they are useful as an external application in bruises, swellings, and some cutaneous diseases. In ointments they are a little inferior to paraffin as a preventive of rancidity.
The bark of P. balsamifera is tonic and cathartic.
---Dosages---Of solid extract, 5 to 10 grains. Of tincture, 1 to 4 fluid drachms. Of fluid extract, 1 to 2 drachms. Of extract of the bark, 5 to 15 grains.
Dracocephalum Canariense or Cedronella Triphylla is known as a garden plant something like Salvia, and called Balm of Gilead for no better reason than that its leaves are fragrant. It is a native of America and the Canaries.
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