but the truth was perfectly safe; and so it will be with the case of the psychological relations of the nervous system when the present course of investigation has sustained a clearer verification and further advance. On this point we have the sayings of two truth-seekers, wise in quality of intellect, impartial and dispassionate in temper, and fearless in the pursuit of their aims. The late Prince Consort is vividly remembered for the characteristic saying which spread rapidly over the country, that he could not understand the conduct of the medical profession in England in leaving the phenomena of mesmerism to the observation of unqualified persons, instead of undertaking an inquiry which was certainly their proper business, in proportion as they professed to pursue _science_. The other authority we refer to is the late Mr. Hallam. A letter of his lies before us from which we quote a passage, familiar in its substance, doubtless, to his personal friends, to whom he always avowed the view which it presents, and well worthy of note to such readers as may not be aware of the observation and thought he devoted to the phenomena of mesmerism during the last quarter-century of his long life. "It appears to me probable that the various phenomena of mesmerism, together with others, independent of mesmerism properly so called, which have lately [the date is 1844] been brought to light, are fragments of some general law of nature which we are not yet able to deduce from them, merely because they are destitute of visible connection--the links being hitherto wanting which are to display the entire harmony of effects proceeding from a single cause." [Persons curious to know what has been developed in this class of studies may find the same in a work published at this office, entitled THE LIBRARY OF MESMERISM AND PSYCHOLOGY--comprising the Philosophy of Mesmerism, Clairvoyance, and Mental Electricity; Fascination, or the Power of Charming; The Macrocosm, or the World of Sense; Electrical Psychology, or the Doctrine of Impressions; The Science of the Soul, treated Physiologically and Philosophically. Complete in one illustrated volume. Price, $4.]