There appears then nothing more for me to say, before I terminate this part, but to add the preservative cautions. I was sensible that this article was wanting to the first edition of this work, and that it was an unjustifiable defect, from the importance of the matter. A gentleman, celebrated in the Republic of Literature for his works, and yet more respectable for his talents, his knowledge, and his personal qualities, than for his name, and for the employments of which he so worthily acquits himself, in one of the first towns in Switzerland, M. ISELIN, (I hope he will forgive my naming him,) made me sensible of that my omission in a very polite manner. I shall quote here an extract of his letter with the more pleasure, for its pointing out exactly what there remained for me to do. “I could wish (says he) to see a work from your hand, in which you would explain the means the most secure and the least dangerous, by which parents, during the time of education, and young persons, when they are left to their own conduct, might the best preserve themselves from that violence of desires which urges them to those excesses, whence arise such dreadful diseases, or to disorders that disturb the happiness of society and their own. I do not doubt of there being a diet that particularly favors continency. I should think that a work that should teach it us, combined with a description of the diseases produced by impurity, would be equivalent to the best treatises of morality on this subject.”