About 1882, Henry M. Parkhurst published a booklet called "Diana," which since that time has passed through several editions, and has had a large number of readers. The principle advocated is radically different from that of Noyes or Dr. Stockham, above mentioned, although some of the writings of Dr. Stockham seem to favor the Parkhurst idea as much as the one advanced by herself. Parkhurst, as we may see by reference to a quotation from him in connection with the Noyes' idea, did not approve of the "male continence" as taught by the latter, although he seems to have considered it a step in the right direction. The gist of the Parkhurst idea is expressed in the following quotations from his booklet, "Diana": "In order to secure proper and durable relations between the sexes, it is necessary to live in harmony with the law of Alphism, that is ABSTINENCE EXCEPT FOR PROCREATION. But if that principle is adopted alone, no means being taken to provide for the due exercise of the sexual faculties, it will likely be abandoned or lead to a life of asceticism. In order to make Alphism practicable for ordinary men and women, another law has to be observed, that is, the law of SEXUAL SATISFACTION FROM SEXUAL CONTACT; understanding by the term 'contact' not merely physical external contact, but using the term in its more general sense to include sexual companionship, or even correspondence, bringing the minds into mental contact. The observance of this law will lead to complete and enduring satisfaction in abstinence. "It is an observed fact that contact incites to activity the affectional action, * * * extending over the whole frame, and by their activities satisfies them, without calling into action the special generative function of the generative organs. And it is also an observed fact that the repression of this affectional activity naturally creates a desire for the exercise of the other; so that a true remedy for sexual intemperance is the full satisfaction of the affectional mode of activity by frequent and free sexual contact. Sexual satisfaction may be obtained by personal presence, conversation, a clasp of the hands, kissing, caressing, embracing, personal contact with or without the intervention of dress.