In Mr. Crookes’s latest paper, published in the Quarterly Journal of Science for January last, we are informed that he has pursued the inquiry for four years; and besides attending séances elsewhere, has had the opportunity of making numerous experiments in his own house with the two remarkable mediums already referred to, Mr. D. D. Home and Miss Kate Fox. These experiments were almost exclusively made in the light, under conditions of his own arranging, and with his own friends as witnesses. Such phenomena as percussive sounds; alteration of the weight of bodies; the rising of heavy bodies in the air without contact by any one; the levitation of human beings; luminous appearances of various kinds; the appearance of hands which lift small objects, yet are not the hands of any one present; direct writing, by a luminous detached hand or by the pencil alone; phantom forms and faces; and various mental phenomena—have all been tested so variously and so repeatedly that Mr. Crookes is thoroughly satisfied of their objective reality. These phenomena are given in outline in the paper above referred to, and they will be detailed in full in a volume now preparing. I will not, therefore, weary my readers by repeating them here, but will remark, that these experiments have a weight as evidence vastly greater than would be due to them as resting on the testimony of any man of science, however distinguished, because they are, in almost every case, confirmations of what previous witnesses in immense numbers have testified to, in various places, and under various conditions, during the last twenty years. In every other experimental inquiry, without exception, confirmation of the facts of an earlier observer is held to add so greatly to their value, that no one treats them with the same incredulity with which he might have received them the first time they were announced. And when the confirmation has been repeated by three or four independent observers under favorable conditions, and there is nothing but theory or negative evidence against them, the facts are admitted—at least provisionally, and until disproved by a greater weight of evidence or by discovering the exact source of the fallacy of preceding observers.