DEDICATION.

with provident care you bring back golden ages to the North the North original: "Septentrioni." A classical term for the northern regions, specifically referring here to the Swedish Empire.. Philosophy—which antiquity acknowledged as the most excellent gift given to the human race by the immortal God—still awaits a corrective hand, so that mortals may reap its distinguished fruits. I have placed this great burden upon my own shoulders; to make them equal to the task as far as I was able, I have striven with the continuous study and labor of many years. Just as Euclid long ago reduced the principles of all mathematical science into a System, so that their truth in-