This is the name given to our small aquatic weed, Anacharis, or Elodea canadensis, which, on being introduced to Europe some years ago, found itself so much at home, that it actually choked up some streams and lakes, so as to almost prevent pleasure boating. Dr. Barnes, of Hanover, now contends that it is not only not an unmixed evil, but an extremely valuable plant, for it " destroys the germs of malaria and dysentery," and he recommends that it be introduced to waters where it does not already exist. He says that fish are always healthier where the plant abounds.