From this One Universal Soul proceed Spiritual Intelligences, above, below, and inclusive of man; the subtle ether out of which they are formed becoming more and more gross, the further it is removed from the divine Source. He classified these Hosts or Hierarchies of Spiritual Intelligences into gods or major divinities, daemones or lesser divine beings of good and bad natures, and thirdly heroes or disembodied human souls, "immortal minds in luminous bodies," in position intermediate between men and the daemones. He declared "the whole air is filled with souls." H. P. Blavatsky says: In the Pythagorean Theurgy these hierarchies of the Heavenly Host and the gods were expressed numerically. The Pythagoreans believed that the forces of nature were spiritual entities. They taught that there are ten spheres formed by the Heavenly bodies, those of Mercury, Venus, Mars, Jupiter, Saturn, the fixed Stars, the Sun, the Moon, the Earth, and the Counter-earth or the Antichthon, about which little has come down to us but which is presumably connected with "the riddle of the Eighth Sphere." Furthermore the Pythagoreans taught that there were ten cardinal pairs of opposites or ten antithetical principles, which constitute the elements or Stoicheia of the Universe, namely, (1) the limited and the unlimited; the finite and the infinite; (2) the One and the Many; (3) light and darkness; (4) good and bad; (5) rest and motion; (6) the masculine and the feminine; (7) the straight and the crooked; (8) the odd and the even; (9) the square and the oblong; and (10) the right and the left. PHOTOGRAPHY AND THE INVISIBLE: by Philip A. Malpas If a spectrum be thrown on a blackboard with a lantern, in a dark room, one end will be violet and the other red, to the ordinary eye. If a plain photographic sensitized plate is placed against the blackboard so as to receive the spectrum on its central portion during a suitable exposure and is then developed, fixed, and replaced in its original position, the result shown is remarkable. At the red end the plate is unaffected; the orange and yellow and green are scarcely recorded; the blue and violet are well represented, but the part of the plate most affected is that beyond the visible violet far into the "darkness" of the blackboard. Here is a sensitive surface or substance which can "see," as though brilliantly lighted, a surface which to the ordinary eye is invisible, but, on the other hand, has some difficulty in seeing the red and yellow, which the eye can see quite plainly. Needless to remark that this is why a true red or yellow light is "safe" for ordinary plates and for dark-rooms. On the other hand it would be possible to have a dark-room which would be to the plate a very light room indeed, being filled with these invisible rays beyond the violet end of the spectrum. [Illustration: Lomaland Photo. and Engraving Dept. VISINGSBORG CASTLE, VISINGSÖ, SWEDEN]