As to the book itself, I was requested, two years since, when residing in Indiana, to publish it, and declined doing so. My chief reasons were, that I doubted its physiological correctness; that I did not consider its style and tone in good taste; but chiefly (as I expressed it in the New Harmony Gazette) because I feared it would be circulated in this country only “to fall into the hands of the thoughtless, and to gratify the curiosity of the licentious, instead of falling, as it ought, into the hands of the philanthropist, of the physiologist, and of every father and mother of a family.” The circumstances I have just detailed may afford proof, that my fears regarding the hands into which it might fall, were well founded. My principles thus officiously and publicly attacked, I have felt it a duty to the cause of reform to step forward and vindicate them; and this the rather, because, unless I give my own sentiments, I shall be understood as unqualifiedly endorsing Richard Carlile’s. Now, no one more admires than I do the courage and strength of mind which induced that bold advocate of heresy to broach this important subject; and to him be the praise accorded, that he was _the first_ to venture it. But the manner of his book I do not admire. There is in it that which was repulsive (I will not say revolting) to my feelings, on the first perusal; and though I afterwards began to doubt whether that first impression was not attributable, in a great measure, to my prejudices, yet I cannot doubt that a similar, and even a more unfavourable impression, will be made on the minds of others, and thus the interests of truth be jeopardized. Then again, I think the physiological portion of his pamphlet somewhat incorrect as to the facts, and therefore calculated to mislead, where an error might be of fatal consequence. It may seem vanity in me to imagine, that this treatise is free from similar objections; yet I have taken great pains to render it so. R. D. O. INTRODUCTION. The reader, after having been taxed with the perusal of two prefaces before reaching the subject matter, may consider it a hardship to be further called upon to read a somewhat lengthy introduction, when the title of a book should be its best preface; but the Editor would ask your indulgence while he briefly states the object and design of the following pages.