By Alphonse Decandolle. This work has proved so popular that this third edition has been issued to meet the demand. The author adds to this, six pages of additions and corrections to the former editions. In regard to the radish it is concluded difficult to believe that it came to us from China or western Asia. The Jesusalem Artichoke is believed to be a descendant in some degree of Hehanthus doronicoides. In regard to the origin of the potato, Prof, de Can-dolle does not agree with Baker and Hooker that all the tuberous solanums, of South America are of one species, and if they are, we are still without any knowledge of the origin of the variety - if we must not call it species - that gave us the potato pure and simple. "Changing a term in nomenclature," says M. de Candolle, "does not alter the main points of the question." The sweet potato is not indigenous to China, but its introduction to that country occurred in the sixteenth century. Purslane, supposed at one time to be an introduction from the old world, and which our weedy garden plant may have been, yet seems to have some claim to being also spontaneous in. some portions of America. Lucerne is certainly spontaneous in the lower regions of the Volga; and Saintfoin is certainly spontaneous in Central Russia.

The Vetch was certainly cultivated in Hungary during the stone age. Chinese Tea is spontaneous in the Island of Hainan. Remains of Cloves have been found in a box of the sixth century in the ruined castle of Horberg, showing that it was an article of commerce at this early date. The Hop is spontaneous in Japan and North America, as well as in Europe. Seed of the Cucumber are found in pre-historic ashes in Hungary. There is also evidence of the Lentil and the garden Pea, and common bean, Faba vulgaris, in the stone age remains of Hungary. The Chick Pea was known in China in the fourteenth century, though its Chinese name indicates a western origin. These are the chief additions to former knowledge.