recognition as one of the great thinkers who have appeared at wide intervals among men, to reveal to them the bare skeleton of some science to come, of which the roots spread slowly, but which, in due time, bring forth fair fruit in the intellectual sphere. Thus a humble artisan, Bernard Palissy, searching the soil to find minerals for glazing pottery, proclaimed, in the sixteenth century, with the infallible intuition of genius, geological facts which it is now the glory of Cuvier and Buffon to have demonstrated. I can, I believe, give some idea of Lambert's Treatise by stating the chief propositions on which it was based; but, in spite of myself, I shall strip them of the ideas in which they were clothed, and which were indeed their indispensable accompaniment. I started on a different path, and only made use of those of his researches which answered the purpose of my scheme. I know not, therefore, whether as his disciple I can faithfully expound his views, having assimilated them in the first instance so as to color them with my own. New ideas require new words, or a new and expanded use of old words, extended and defined in their meaning. Thus Lambert, to set forth the basis of his system, had adopted certain common words that answered to his notions. The word Will he used to connote the medium in which the mind moves, or to use a less abstract expression, the mass of power by which man can reproduce, outside himself, the actions constituting his external life. Volition--a word due to Locke--expressed the act by which a man exerts his will. The word Mind, or Thought, which he regarded as the quintessential product of the Will, also represented the medium in which the ideas originate to which thought gives substance. The Idea, a name common to every creation of the brain, constituted the act by which man uses his mind. Thus the Will and the Mind were the two generating forces; the Volition and the Idea were the two products. Volition, he thought, was the Idea evolved from the abstract state to a concrete state, from its generative fluid to a solid expression, so to speak, if such words may be taken to formulate notions so difficult of definition. According to him, the Mind and Ideas are the motion and the outcome of our inner organization, just as the Will and Volition are of our external activity. He gave the Will precedence over the Mind. "You must will before you can think," he said. "Many beings live in a condition of Willing without ever attaining to the condition of Thinking. In the North, life is long; in the South, it is shorter; but in the North we see torpor, in the South a constant excitability of the Will, up to the point where from an excess of cold or of heat the organs are almost nullified." The use of the word "medium" was suggested to him by an observation he had made in his childhood, though, to be sure, he had no suspicion then of its importance, but its singularity naturally struck his delicately alert imagination. His mother, a fragile, nervous woman,