As a dose of the triturated powder, reduced to a weaker dilution, ten grains may be taken twice a day [115] mixed with a dessertspoonful of water; or of the tincture largely reduced in strength, ten drops twice a day in like manner. Chemically, the oil globules extracted from the spores contain "alumina" and "phosphoric acid." The diluted powder has proved practically beneficial for reducing the swelling and for diminishing the pulsation of aneurism when affecting a main blood-vessel of the heart. In Cornwall the Club Moss is considered good against most diseases of the eyes, provided it be gathered on the third day of the moon when first seen; being shown the knife whilst the gatherer repeats these words:-- "As Christ healed the issue of blood, Do thou cut what thou cut test for good." "Then at sundown the Club Moss should be cut by the operator whilst kneeling, and with carefully washed hands. It is to be tenderly wrapped in a fair white cloth, and afterwards boiled in water procured from the spring nearest the spot where it grew," and the liquor is to be applied as a fomentation; or the Club Moss may be "made into an ointment with butter from the milk of a new cow." Such superstitious customs had without doubt a Druidic origin, and they identify the Club Moss with the Selago, or golden herb, "Cloth of Gold" of the Druids. This was reputed to confer the power of understanding the language of birds and beasts, and was intimately connected with some of their mysterious rites; though by others it is thought to have been a sort of Hedge Hyssop (_Gratiola_). The Common Lycopodium bears in some, districts the name of "Robin Hood's hatband." Its unmoistenable powder from the spores is a capital absorbing application to weeping, raw surfaces. At the shops, this [116] powder of the Club Moss spores is sold as "witch meal," or "vegetable sulphur." For trade purposes it is obtained from the ears of a Wolfsfoot Moss, the Lycopodium clavatum, which grows in the forests of Russia and Finland. The powder is yellow of colour, dust-like and smooth to the touch. Half a drachm of it given during July in any proper vehicle has been esteemed "a noble remedy to cure stone in the bladder." Being mixed with black pepper, it was recognized by the College of Physicians in 1721 as a medicine of singular value for preventing and curing hydrophobia. Dr. Mead, who had repeated experience of its worth, declared that he never knew it to fail when combined with cold bathing. Club Moss powder ignites with a flicker, and is used for stage lightning. It is the _Blitzmehl_, or lightning-meal of the Germans, who give it in doses of from fifteen to twenty grains for the cure of epilepsy in children.