The Persians were extremely addicted to the study and practice of the black art and all magical incantations, supposing that by such mysterious operations they could influence the elements and all the products of nature. When any one was suspected to have died an unnatural death, the surviving relatives consulted spirits, with the view of discovering the cause of it. Sometimes the relatives alleged that a spell had been cast on the spirits consulted, which prevented their giving answers to interrogatories. In that case, magicians were employed to remove the fascination. A suspected murderer was submitted to a severe ordeal:--A particular liquid was poured upon the arm or thigh of the unfortunate person; but before the fluid was used it was boiled, while the supposed criminal's name was repeatedly mentioned. The moment the liquid began to boil, they commenced to address their imaginary spirits in the following terms: "Is the party on whom I pour this water guilty or not? If he is, may it scald him and shrivel up his skin." If the application of the boiling liquid did not injure the suspected person he was declared innocent, but if it burned him he was pronounced guilty. People anxious to know the result of approaching warlike engagements put a vessel full of water, mixed with particular ingredients, over a fire. As soon as the water commenced to boil they performed magical incantations, which, as they imagined, irresistibly attracted the titular genius of their enemies, and obliged the spirit or god to plunge himself into it. In this painful situation they confined him for a considerable time. When he had endured sufficient penance to humble him, he was questioned relative to the success of the war. The information sought was delivered, as the people thought, through the appearance of the scum on the water. By turning a red-hot pot upside down, attended with magical incantations, they imagined the courage of their soldiers exposed to its heat could be raised.