If added to an ordinary embrocation the oil of [336] Pennyroyal increases the reddening and the benumbing (anodyne) effects, acting in the same way as, menthol (oil of Peppermint) for promptly dispelling severe neuralgic pain. With respect to the Pennyroyal, folk speak in Devonshire of "Organs," "Organ Tea," and "Organ Broth." An essence is made of the oil, mixed and diluted with spirit of wine. The Pennyroyal has proved useful in whooping cough; but the chief purpose to which it has long been devoted, is that of promoting, the monthly flow with women. Haller says he never knew an infusion of the herb in white wine, with steel, to fail of success; _Quod me nunquam fefellit_. It is certain that in some parts of England preparations of Pennyroyal are in considerable demand, and a great number of women ascribe _emmenagogue_ properties to it, that is, the power of inducing the periodical monthly flux. Many married women of intelligence and close observation, assert as a positive fact, that Pennyroyal will bring on the periodical flow when suppressed; and yet the eminent jurisprudist, Dr. Taylor, was explicit in declaring that Pennyroyal has no such properties. He stated that it has no more effect on the womb than peppermint or camphor water. So there is difficulty in collecting evidence as regards the real action of Pennyroyal in such respect. Chemists supply the medicine in the full belief of this eminent opinion just quoted: at the same time they know it is not wanted for "catarrh of the chest," as alleged. The purchaser keeps her secret to herself, and does not communicate her experience to anyone. Dr. Taylor evidently supposed Peppermint water and Camphor water to be almost inert, especially as exercising any toxical effect on the womb. The medicinal basis of the latter is certainly a powerful agent, and its stimulating volatile principles [337] are found to exist in most of the aromatic herbs; in fact, Camphor is a concrete volatile vegetable oil, and camphoraceous properties signalise all the essences derived from carminative Herbal Simples. The Camphor of commerce is secreted by trees of the laurel sort native to China and Japan, whilst coming also from the West Indies. Everyone knows by sight and smell the white crystalline granular semi-translucent gum, strongly odorous, and having a warm pungent characteristic taste. Branches, leaves, and chips of the trees are soaked in water until it is saturated with the extract, which is then turned out into an earthen basin to coagulate. This is completely soluble in spirit of wine, but scarcely at all in water; nevertheless, if a lump of the Camphor be kept in a bottle of fresh water, to be drawn off from time to time as required, it will constitute Camphor julep. A wineglassful of it serves to relieve nervous headache and hysterical depression.