". Engaging in spiritism have a very natural desire independently to enter into intermingling with spirits. This composition is intended to facilitate their labour, delivering possibility to take advantage of garden-stuffs of our long and permanent employments to them, because those, who think that it is enough to be able to lay fingers on a table on purpose to compel him to move or hold a pencil that must write very wrong, to appear experience in this business. Equal wrong and those, who suppose to find the exact and immutable rule of creation of psychics in this book. The rules of poetry, painting and musics, make neither poets, nor painters nor musicians out of those, who does not have talent| they direct natural capabilities only. The same can be said and in regard to our composition: his object consists only in that, to specify facilities to developing a медиумической flair so, as far as allow natural facilities each, and in particular to give useful direction, when this ability exists. ".