It would require a volume to enumerate all the advantages which have resulted from the discovery of this science. But even these are about to be quadrupled by the successful experiments recently made in the immortal and euphoniously titled science of phrenodontology, by which a man's _grinders_ are regarded as the unerring indices of his habits, manners and propensities; and should these last be of an evil nature, they can be entirely eradicated by the extraction of such of the _incissores_ as indicate their existence. There is no necessity whatever of inculcating self denial, regular habits, fortitude and virtue, to correct the depravity and vice of any individual. Only knock out his teeth, (or as that method is somewhat too summary,) have them extracted _secundum artem_ by a dentist, and you instantly metamorphose him into a paragon of moral purity! But one of the principal benefits of the "March of Mind," is the salutary reformation effected in the opinions of mankind, in relation to numerous important subjects. All those low and grovelling ideas which once tenanted the crania of our honest yeomanry as to the education of their children, have now evaporated into thin air. Instead of tying their sons to a vulgar plough, bronzing their visages to the complexion of an Indian, as was formerly the absurd practice, they are now transplanted into the genial hothouse of a town life, where they are soon installed in all the fashionable paraphernalia of tights, dickey, and safety chain; and astonish their honest old dads by the dexterity with which they flourish a yardstick, and by the surprising volubility with which they can chatter nonsense, _a la mode du bon ton_. I have often been enraptured with the incontrovertible evidence of the "March of Mind," when I saw one of these praiseworthy youngsters, with his crural appendages, cased in a pair of eelskin inexpressibles, and his nasal adjunct inflamed to that rubicund complexion which Shakspeare has immortalized in the jovial Bardolph, quiz a country greenhorn, and _cul_, in the genuine Brummel style, some vulgar, lowborn, mechanic acquaintance, who insolently aspired to the honor of a nod! The improvement too, in the education of our young ladies, is "confirmation strong as proof of holy writ," of the rapid and resistless march of science and intellect. With a precocity of talent which would have absolutely dumbfoundered a belle of the olden time, they now arrive at full maturity at the age of thirteen; when "My dukedom to a beggarly denier,"