Christian science is stated to be a religious system which was "discovered," in 1866, by Mrs. Mary Baker G. Eddy, a lady now living in the vicinity of Boston, Mass., who has passed her eightieth year, and who is called by her followers the "Mother of the Christian Science Church," or "Mother Mary." Mrs. Eddy has formulated Christian Science in a book entitled Science and Health, with Key to the Scriptures, in which book are to be found the principles upon which this system rests. We are told that to him who studies this book reverently and conscientiously there will be revealed "the Truth," for which man has been searching without avail since the beginning of his existence; that the faithful student will find in Christian Science an infallible guide for the conduct of life in all its phases; and that the Christian Scientist has the power to heal without any therapeutic means, other than that of the influence of mind upon mind, all imaginable ills, surgical or medical, which afflict mankind and the lower animals. Mrs. Eddy tells us that she and her followers have had this power transmitted to them from Jesus Christ, and that they are able to heal the sick and to perform miracles as He is said to have done. In Science and Health all religious systems other than "Christian Science" are held to have been erroneous and pernicious in their influence upon mankind, and the practice of medicine, as it is taught in the medical colleges, is considered to be hurtful rather than helpful to humanity, and to have increased disease rather than ameliorated human suffering. It is said that in 1898 there were in the Greater City of New York three thousand Christian Scientists and seven Christian Science churches. The whole number of Christian Scientists is declared to be one million, of whom one hundred thousand, it is said, are engaged in the business of "healing," and are called "healers." The movement has been and is spreading day by day. In religious matters Christian Science has divided many homes, and has destroyed not a few through the mischief produced by its propaganda. It is claimed that Christian Science has cured many who have not been benefited by the efforts of regular practitioners of medicine. On the other hand, many have died during the exclusive ministrations of Christian Scientists. Moreover, Christian Science considers itself entitled to disregard such sanitary laws, including those concerning infectious diseases, as have been found effectual to preserve intact the general health of communities and peoples. Christian Science, then, is a cult unusually powerful and far reaching in its influence, and it is therefore entitled to and should invite correspondingly careful investigation of all its various aspects.