LEICESTER.--(From a correspondent.)--Seeing in your journal an account from a correspondent, of some mesmeric experiments with metals, I beg to send you a brief account of a few experiments I have made on the same subject, the results of which, however, do not agree with those of your correspondent, and it is for that reason I send them, as I think that it is only by the accumulation of a variety of facts that an explanation will be found. The patient is a boy of about fourteen, of a sanguine temperament, and displays all the usual phrenological and cataleptic phenomena in great perfection. No single metal appears to have any effect upon him, not even gold. Any two metals in contact have a most decided and powerful effect. I have tried with gold, silver, copper, zinc, and iron. If any one of these is in the patient's hand, on being touched with any other he immediately drops it, complaining that it hurts and burns him. He can hold any two in different hands, or in the same hand if they are not allowed to come in contact with each other. Wood or stone with a metal produces no effect. From these facts I think it appears a fair conclusion, that the effect is produced by galvanic action to which, in the mesmeric state, the body appears extremely susceptible.

     Any two metals in contact with each other and held in the hand do undoubtedly, by means of the moisture of the hand, form a galvanic circuit, and a galvanic circuit cannot be formed without two metals, or two different fluids.

     The effects of gold alone, or any single metal, which I have not witnessed, must be owing to a different cause.

     The patient who exhibits the phenomena shews the sympathy of feeling very distinctly. If three or four persons take hold of hands, and are connected with him through me, on the last person being pinched he instantly complains and exhibits most unequivocal signs of feeling.

--Alfred R. Wallace.