Page:Popular Science Monthly Volume 30.djvu/50

38 M. Chevreul gives us, like that of an old oak overshadowing generation after generation of younger trees.

A partial conception of the length of M. Chevreul's still useful activity, and of the extent of his contributions to human welfare, may be gained by recollecting that, his first important work having been



published in 1806, he has been engaged for more than eighty years in fruitful investigations. As early as 1825, or sixty-one years ago, he was spoken of in "The Lancet" (May 28th) as "one of the most able chemists of the present day in France." He was then pursuing his