In consenting to the publication of the following pages, the author yielded to the request of gentlemen whose opinions he did not feel at liberty to disregard; he therefore hopes to avoid the imputation of vanity, with which he might have been charged, had he obtruded himself on the attention of the public, unsolicited. That the habitual use of tobacco is a wide spread, and spreading evil, will be acknowledged by all. This has been felt for years by the most enlightened members of the Faculty. That it causes many diseases, particularly visceral obstructions, and renders many others exceedingly difficult to cure, is demonstrated in the daily experience of every practitioner. The conviction that this habit was constantly extending by the advice and example of physicians, first induced the author to undertake the discussion of this subject before the respectable Society to which he has the honor to belong. Whether the attempt has been successful, the public will judge. That it is imperfect, will not be denied; but it is believed to have claims as a candid statement of facts.