[Footnote O: In some cases the printed matter used by the drug companies also bears the "_Official Endorsement_" of the local "_Social Purity Association_" stamped upon it in indelible ink--a magnificent tribute to the educative work of the Public Health Department, as well as to the enlightened courage of the Social Purity Associations. The following is quoted as sample of directions authorised in U.S.A.:-- "The use of this package is not to be construed as a licence to exposure. Pro-Ven, the original preventive. _The only sure_ way to prevent infection: _Do not expose yourself._ All exposures should be considered as infections, for 90 per cent. of all "easy women" are infected. By proper use of the contents of this package disease may be prevented, as the action upon the germs is as effective as can be secured by the latest scientific knowledge; if exposed, _use within two hours_. After contact: 1st. Urinate. 2nd. Remove the cap from tube; take organ in the hand, holding the canal open; insert tip of the tube and squeeze half of the contents into the canal. 3rd. Squeeze the remainder on the outside of the organ, rubbing well into the creases and folds under and back of head and clear to the body. 4th. Leave ointment on three or four hours. Remember: It is best to use _Pro-Ven_ immediately after exposure; never delay more than two hours if possible. _Pro-Ven_ is not a cure--it is designed to keep men from getting disease; it can be used as a lubricant and preventive both before and after exposure. _Pro-Ven_ is harmless and will not cause pain or injury to the sexual organs. Insist upon having _Pro-Ven_. At all good druggists, or directly by mail, 25 cents a tube; 5 tubes, $1.00. Booklet mailed free upon request. The Pro-Ven Laboratories, Washington, D.C. This product has been tested and approved by the Pennsylvania State Department of Health Laboratories." In addition to _Pro-Ven_, the following proprietary tubes of self-disinfecting ointment have, to my knowledge, been authorised by the Department of Health, and samples were sent to me:-- _Procaline_, manufactured by the Hawthorne Drug Speciality Co., Inc., 88-90, Reade Street, New York City. _Cargenios_, manufactured by H.K. Mulford Company, Philadelphia. _Andron_, manufactured by Andron Hygienic Co., 120, W. 32nd St., New York City. _Sanitube_, manufactured by the Sanitube Co., Newport, R.I., U.S.A. Excellent printed directions and pamphlets accompany these tubes.--E.A.R.]