158 For the inhabitants of hell are four rivers, in oppo- sition to those in heaven; they are called " that of *' heat; that of water, blood, and matter; that of " liquid pitch : and that of poison ;*' that is to say : death, ignorance, simple ignorance, and compound ignorance; for it is said : " These are the similes which we propose to men; the wise only under- stand their explanation." ACCOUNT OF THE TREE TUBA, WHICH is IN HEAVEN, AND THE TREE ZAKUM, WHICH IS IN HELL. It is to be known that Tuba1 is a celestial tree which sends branches into every corner of heaven ; and this is an emblem of the tree of wisdom, from which branches extend to every corner—to any body, whether it be elemental or imaginary; that is to say, to every mind which is illumed and warmed by a ray of the sun of wisdom; it is by this light that his speech and conduct answer the exigency of 1 Tuba, says Herbelot, according to the Commentators of the Koran, is a word derived from the Ethiopian language, and means properly " eternal beatitude." The Tuba, as the heavenly lotos tree, or tree of life, occurs in all mythologies, in the Chinese, Indian, Persian, Egyp- tian, and Scandinavian. This tree is represented upon the coffin of a mummy which exists in the imperial cabinet of Vienna; a deity pours out from its branches the paradisiacal fountain, which, according to the Mu- hammedans, issues from the roots of the tree of life.—(See The Mines of Orient, vol. V,)