In different classes the sensitive powers are known to vary greatly as they do indeed among those of the same species. "But," it has been asked, "granting that emanations from subterraneous waters may powerfully effect certain persons, what connection is there between this impression and the motion or rotation of the hazel rod which is held in the person's hand or laid over his fingers?" What! is it fact that the hazel rod or white thorn moves or rotates in the hands of a person of a certain impressionability, when that person passes over any ground underneath his footsteps on which there happens to be a metallic lode or a subterraneous stream of water which we call a spring? I have been informed by highly respectable persons, who have in the West of England, witnessed the facts, that under these circumstances a hazel or a white thorn rod does rotate and does move and occasionally dips with so energetic a force that on one occasion the bark of a fresh hazel rod was stripped from the stick and left in the grasp of the operator's hand. The following extracts will further illustrate the subject: "Although the effects or motion of the divining rod, when in the proximity of springs, has been and is to this day considered by most philosophers a mere illusion, yet I think the following brief observations relating to the subject, and which was communicated to Dr. Hutton by a lady of rank, with the account of her subsequent experiments performed before him, his family and a number of friends, (as given in the Doctor's translation of Montucla's edition of Ozanam's Recreations), must convince the most incredulous that in the hands of some persons in certain situations the baguette is forcibly acted on by some unknown, invisible cause. Notwithstanding the incredulity expressed by Montucla relative to the indication of springs by the baguette or divining rod, there appears to exist such evidences of the reality of that motion as it seems next to be impossible to be questioned. This evidence was brought about in the following manner. Soon after the publication of the former edition of the Recreations, the editor received by the post the following well written pseudonymous letter on the subject of this problem. The letter in question is dated Feb. 10, 1805, and, as with the whole correspondence it would be too long for our limits, I shall select such parts only as are immediately essential to a right understanding of the subject.