The nervous tissues present quite another state of things. The great mass of cerebral matter, with all its complicated organs and their appendages, are hid within the cranium of the skull. We have no ocular proof of anything that is done by that structure, or of the manner in which the tissue acts. That we can see, hear, taste, and smell we know. We recognize the organs that perform these functions. Sensation, feeling, memory, thinking, cannot so easily be accounted for. Among the masses it is a mystery to-day. The doctrine of a dual existence in man is old, still it is held on to with remarkable tenacity. The church still teaches and preaches that soul or spirit is a part of some great personality or individuality not at all connected with nature--supernatural, divine, godly. This supernatural part, it is said, is placed in man some time during the process of birth. This subject will be more fully discussed farther on, in order to show what queer views theologians formerly held on some scientific subjects. I beg to quote from a Talmudistic scholar and philosopher some thousand years ago: PHILOSOPHICO-ANATOMICAL VIEWS OF A CELEBRATED HEBREW AUTHOR, AFTER TALMUDISTIC INTERPRETATION. Jehuda ha-Levi ben Samuel, whose Arabic name was Abulhassan, considered an authority and philosopher of repute, was born in Castile 1085 A.D. He adopted medicine for his profession, but was also a traveler, philosopher, and student, and a Talmudistic scholar and writer. He wrote a book called "Sepher Hakusir: Book Kusari." It is a philosophico-theologico-scientific treatise, conducted in dialogue between himself and the king of Kusar, who became convinced of the truth of his argument and was converted to the Hebrew faith. In the fourth part, section 25, page 246, Jehuda ha-Levi is explaining the harmonious working of the whole universe, and in evidence thereof he cites the world, soul, and year, very learnedly setting forth the mysterious working of creation, the supernatural origin and significance of the Hebrew letters, the secret and hidden meaning of their number, etc. This is based upon the principle that one rests on three, three on seven, and seven on twelve, as follows: Letters: Three Mothers, A. M. Sh. Alof, Mem, Shin. World, Air, Water, Fire. Man, Chest, Abdomen, Head. Year, Dampness, Cold, Heat. Letters: Seven double one. B. G. D. K. Ph. R. T. Bet, Gimmel, Dalet, Kof, Fe, Rosh, Tave. World: Saturn, Jupiter, Mars, Sun, Venus, Mercury, Moon. Man: Wisdom, riches, dominion, life, kindness, posterity, peace. Year: The seven days in the week.