The influence of superstition on medicine may be accounted for by the fact, that from the very first, ideas with regard to the action of drugs must have been combined with those concerning supernatural agencies, for the phenomena of nature in very early times were attributed to spirits. Diseases were supposed to be due to an evil spirit, therefore to cast the disease out was equivalent to curing it, and the methods used for this purpose were by no means always ineffective in curing disease.

Incantations and spells were generally used in addition to a real remedial agent, but the incantations usually got the credit for effecting the cure.

In early times superstition played an important part in the cure of disease, and it prevails to a certain extent to-day. “In the opinion of the ignorant multitude,” says Lord Bacon, “witches and impostors have always held a competition with physicians.”

There has ever been a peculiar propensity in the human mind to foster a belief in the supernatural, and perhaps more especially in respect to medicine on account of the obscurity and ignorance with which it was once surrounded. In early times almost every disease was attributed to punishment for evil-doing, the working of some demon, or the influence of the stars; hence the use of any article that was strange or rare as a remedy.

“The employment of precious stones for medicinal purposes,” writes De Boot, “arises from an Arab superstition which supposed them to be the residence of spirits.” They were first used as amulets, and then gradually came to be administered inwardly for various ailments.

“Mystery is the very soul of empiricism,” says Paris; “withdraw the veil, and the confidence of the patient instantly languishes.” A propensity to attribute every ordinary and natural effect to extraordinary and unnatural causes, is one of the striking characteristics of medical superstition.

The properties that herbs possessed were attributed by the old physicians to the planets which were supposed to influence them, and our medical men to this day head their prescriptions with a sign that originally meant an invocation to Jupiter, which is a surviving relic of this old superstitious practice. Another very curious fact with respect to medical superstition is, that many of the greatest philosophers were firm believers in it. Lord Bacon is said to have believed in the existence of a panacea that would prolong life beyond its natural term. He considered that the principal cause of death was the action of the external air in drying and exhausting the body, which he thought might be prevented by nitre; but although he took three grains of his favourite salt every morning for the last thirty years of his life, he died at the age of sixty-six. We have many customs at the present day which are a survival of the days of superstition, and few have any idea of their origin. The mother, when she hangs round the neck of her child the plaything known as a coral and bells, little imagines she is perpetuating an ancient superstitious practice. The soothsayers attributed many mystic properties to coral, and it was believed to ward off the evil eye, and drive away devils and evil spirits. For this purpose it was suspended from a child’s neck as an amulet. Pliny and Dioscorides greatly esteemed the medicinal properties of coral, and Paracelsus recommends that it should be worn around the necks of infants to keep away fits, sorcery, charms, and to serve as an antidote to poisons. The bells usually suspended to it were originally intended to frighten away evil spirits, and not to amuse the child alone.

Paris mentions a curious circumstance, viz., that the same superstitious belief should exist among the negroes of the West Indies, who affirm that the colour of coral is always affected by the state of health of the wearer, it becoming paler in disease.

But all the remedies that originated in superstition were not entirely useless. Some, whether by accident or not, had a natural power of efficacy, and led to discoveries of importance. In the time of James I., a powder known as the sympathetic powder of Sir Kenelm Digby had a great reputation for healing wounds. Whenever a wound had been inflicted, this powder was applied to the weapon which had caused it, which was also smeared with ointment and dressed two or three times a day. The wound itself was directed to be brought together and carefully bound up with clean linen rags, but above all to be let alone for seven days, at the end of which time it was generally found to be healed. This was, of course, said to be due to the wonderful properties of the sympathetic powder, instead of the fact of excluding the air from the part and not interfering with nature’s own healing powers. The mysterious sympathetic healing powder was afterwards said to be simply calcined green vitriol. The rust of the spear of Telephus, alluded to by Homer as a cure for the wounds which that weapon inflicted, was probably verdigris, and led to the discovery of its use as a surgical dressing.