est, he deserves well of science. If an application capable of furnishing the country a new source of wealth arises out of his labors, it is a glory to him; but the man of science finds his highest recompense when he has succeeded in spreading a comfort through the nation, and procuring for those who are disinherited of this world's goods a little of the luxury which it had seemed could only be obtained with wealth. Master, experimenter, philosopher, Monsieur Chevreul, you
Chevreul at the Age of Fifty.
have known all of these triumphs. Again I tell you, nothing is wanting to the fullness of your life. By your stories of remote events of which you have been a witness, you have charmed those who in age might be your sons, and those, still more numerous, who might be your grandsons. Your memory, yet in its freshness, permits you still to instruct those who might be your great-grandchildren. After tomorrow, you will count the days, weeks, and years of your new century. That the years may be many is the wish of your fellows and admirers." M. Chevreul in reply cited as a proof that a man's reputation depends greatly upon the trial of time, the examples of Newton and Leibnitz, the latter of whom said, "Seek first the demonstration of causes." "Newton preferred the more fruitful idea, 'Seek the cause of phenomena, and when you have found it inquire what is the cause of that cause.' There is a wide gulf between the two formulas. To my mind Newton is greater than Leibnitz. Time has proved it." Representative scientific men of other countries, com-
