We must ourselves recognise the truth, and instruct parents, that it is a physiological untruth to suppose that sexual congress is indispensable to male health. We must warn our young men that no loose woman picked up in the streets, or in a brothel, or in her own house, can be pronounced physically safe, no matter how attractive she may seem to be. We must warn our poor young women patients that yielding to the solicitations of a supposed lover may unfit them to become healthy wives and mothers. We must persistently arouse the conscience of parents to the very grave risks that their daughters run in uniting themselves to men of former loose life. This is the confidential but imperative duty of true physicians. It is by quiet but never-ceasing effort to spread the true view of scientific medicine amongst our patients, and wherever the opportunity occurs, that our influence as Christian physicians will gradually permeate society, and cause truth to prevail over error. If you perceive that the principles I have laid down are sound, then hold to them firmly as the most precious truth. Meet together to mature practical applications of those principles by intercommunication of experience and mutual encouragement, feeling sure that where two or three meet together in the everlasting Spirit of THE CHRIST, you will find, as I have found during a long life, that light and strength will be given you, and as earnest followers of the Great Physician you will take part in that mighty work of regeneration, which from our present small beginnings will, I fully believe, grow and transfigure the twentieth century. APPENDIX I. (PAGE 91) The following testimony is by Dr. T. GAILLARD THOMAS, a recognised gynæcological authority of New York.