This is the 14th Symbol in the Protreptics of Iamblichus, whose explanation of it is as follows: “This symbol exhorts us to the exercise of justice, to the honoring equality and moderation in an admirable degree, and to the knowledge of justice as the most perfect virtue, to which the other virtues give completion, and without which none of the rest are of any advantage. It also admonishes us, that it is proper to know this virtue not in a careless manner, but through theorems and scientific demonstrations. But this knowledge is the business of no other art and science than the Pythagoric philosophy alone, which in a transcendent degree honors disciplines before every thing else.” The following extract also from my Theoretic Arithmetic, (p. 194.), will in a still greater degree elucidate this symbol. The information contained in it is derived from the anonymous author of a very valuable work entitled Θεολογουμενα Αριθμητικης _Theologumena Arithmeticæ_, and which has lately been reprinted at Leipsic, “The Pythagoreans called the pentad providence and justice, because it equalizes things unequal, justice being a medium between excess and defect, just as 5 is the middle of all the numbers that are equally distant from it on both sides as far as to the decad, some of which it surpasses, and by others is surpassed, as may be seen in the following arrangement: 1. 4. 7. 2. 5. 8. 3. 6. 9. “For here, as in the middle of the beam of a balance, 5 does not depart from the line of the equilibrium, while one scale is raised, and the other is depressed.