It was found, also, that the shape of the brain, at the foundation-point, was of the same general form or shape as the earth on which we dwell; that is to say, an oblate spheroid, whence, by experiment, it was deduced that such section of a figure, oblately spheroidal, was also the very best form of a magic mirror. Such a figure having two mathematically true and absolutely certain foci, so that a stream of magnetism being thrown upon one focus slid along the surface and returned to the centre of the other focus, from the centre of the fore-brain, thus completing a magnetic circuit and rendering the portion of brain in the line of contact exceedingly active, by reason of its increased magnetic play and motion of the brain-particles there situate.