perceive these etheric vibrations, but can also—if he has learnt how it is done—adapt them to his own ends, or himself set them in motion. It will be readily understood that superphysical forces and the methods of managing them are not subjects about which much can be written for publication at fopms present, though there is reason to suppose that it may not be very long before at any rate some applications oj: one or two of them come to be known to the worlc^at large : but it may perhaps be possible, without transgressing the limits of the permissible, to give so much of an idea of them as shall be sufficient to show in outline how certain phenomena are performed. All who have much experience of spiritualistic f dances at which physical results are produced must at one -time or another have seen evidence of the employment of practically resistless force in, for example, the instantaneous movement of enormous weights, and so on; and if of a scientific turn of mind, they may perhaps have wcftidered whence this force was obtained, and what was the leverage employed. As usual in connection with astral phenomena, there are several ways in which such work may have been done, but it will be enough