Publisher's Synopsis
The subject treated in the following pages has made great progress in the course of forty years. Now what we are concerned with in psychical studies is always unknown forces, and these forces must belong to the natural order, for nature embraces the entire universe, and everything is therefore under the sway of her sceptre. I do not conceal from myself, however, that the present work will excite discussion and bring forth legimate objections, and will only satisfy independent and unbiased investigators. But nothing is rarer upon our planet than an independent and absolutely untrammelled mind, nor is anything rarer than a true scientific spirit of inquiry, freed from all personal interest. Most readers will say: "What is there in these studies, anyway? The lifting of tables, the moving of various pieces of furniture, the displacement of easy-chairs, the rising and falling of pianos, the blowing about of curtains, mysterious rappings, responses to mental questions, dictations of sentences in reverse order, apparitions of hands, of heads, or of spectral figures, -these are only common place trivialities or cheap hoaxes, unworthy to occupy the attention of a scientist or scholar. And what would it all prove even if it were true? That kind of thing does not interest us."
