One work in the English language is somewhat similar to these works of the Hindoos. It is called 'Kalogynomia: or the Laws of Female Beauty,' being the elementary principles of that science, by T. Bell, M.D., with twenty-four plates, and printed in London in 1821. It treats of Beauty, of Love, of Sexual Intercourse, of the Laws regulating that Intercourse, of Monogamy and Polygamy, of Prostitution, of Infidelity, ending with a _catalogue raisonnee_ of the defects of female beauty. Other works in English also enter into great details of private and domestic life. 'The Elements of Social Science, or Physical, Sexual and Natural Religion,' by a Doctor of Medicine, London, 1880, and 'Every Woman's Book,' by Dr. Waters, 1826. To persons interested in the above subjects these works will be found to contain such details as have been seldom before published, and which ought to be thoroughly understood by all philanthropists and benefactors of society. After a perusal of the Hindoo work, and of the English books above mentioned, the reader will understand the subject, at all events from a materialistic, realistic and practical point of view. If all science is founded more or less on a stratum of facts, there can be no harm in making known to mankind generally certain matters intimately connected with their private, domestic, and social life. Alas! complete ignorance of them has unfortunately wrecked many a man and many a woman, while a little knowledge of a subject generally ignored by the masses would have enabled numbers of people to have understood many things which they believed to be quite incomprehensible, or which were not thought worthy of their consideration. INTRODUCTION. It may be interesting to some persons to learn how it came about that Vatsyayana was first brought to light and translated into the English language. It happened thus. While translating with the pundits the 'Anunga runga, or the stage of love,' reference was frequently found to be made to one Vatsya. The sage Vatsya was of this opinion, or of that opinion. The sage Vatsya said this, and so on. Naturally questions were asked who the sage was, and the pundits replied that Vatsya was the author of the standard work on love in Sanscrit literature, that no Sanscrit library was complete without his work, and that it was most difficult now to obtain in its entire state. The copy of the manuscript obtained in Bombay was defective, and so the pundits wrote to Benares, Calcutta and Jeypoor for copies of the manuscript from Sanscrit libraries in those places. Copies having been obtained, they were then compared with each other, and with the aid of a Commentary called 'Jayamangla' a revised copy of the entire manuscript was prepared, and from this copy the English translation was made. The following is the certificate of the chief pundit:--