Dr. Warren says, "The common belief that tobacco is beneficial to the teeth, is entirely erroneous; on the contrary, by its poisonous and relaxing qualities, it is positively injurious." Says another physician, "Though snuff has been prescribed for the head-ache, catarrh, and some species of opthalmia, and sometimes with good effect; yet in all cases where its use is _continued_, it not only fails of its medical effect, but commits great ravages on the whole nervous system, superinducing hypochondria, tremors, a thickening of the voice, and premature decay of all the intellectual powers." As a diuretic, Dr. Fowler, and others, have found it in some cases to be valuable. Its narcotic properties have sometimes assuaged the tooth-ache; but it always hastens the destruction of the teeth. But of all substances in pharmacy, there seems to be a general agreement among medical writers, that tobacco, though occasionally beneficial, is the most unmanageable, and used with the least confidence. A multitude of cases, confirming these views, have actually occurred; two or three of which I will cite. A clergyman, who commenced the use of tobacco in youth, says, "that no very injurious consequences were experienced till he entered the ministry, when his system began to feel its dreadful effects. His voice, his appetite, and his strength failed; and he was sorely afflicted with sickness at the stomach, indigestion, emaciation, melancholy, and a prostration of the whole nervous system. All this," says he, "I attribute to the pernicious habit of smoking and chewing tobacco." At length he abandoned the quid and the pipe. His voice, appetite, and strength were soon restored; all aches subsided, and in a little time general health was enjoyed. Another clergyman writes, "I thank God, and I thank you, for your advice to abandon smoking; my strength has doubled since I relinquished this abominable practice." A respectable gentleman in middle life, who commenced chewing tobacco at the age of eighteen, was long afflicted with depression of spirits, great emaciation, and the usual dyspeptic symptoms.--All attempts to relieve him were fruitless, till he was persuaded to dispense with his quid. Immediately his spirits revived, and he soon regained his health.[A] [A] Extracts in point might here be given from numerous letters received by the Author, since the publication of the first edition; but it is unnecessary. Cases of reform and cure are occurring by thousands, every year, all over the land. Let every lover of tobacco, who is afflicted with _dyspepsia_, and nervous maladies, _reform_, immediately and entirely; and let him adopt a simple and rational system of diet, regimen, and employment; and in nine cases out of ten, he may hope to enjoy good health, and live long to bless the world.