From the beginning of the first chapter: 1. ORIGIN AND HISTORY. A. Origin. There are tropical shores where cocoanuts and bananas do t thrive; there are tropical districts where the sweet potato is unkwn. Both are exceptions. In the far East, where rice is the daily food of millions; on a thousand isles of the Pacific, where bananas and cocoanuts are the common fare; in the lands of the Aztecs and Incas, where beans are the national dish, the sweet potato is universally cultivated. Even in the great country where Corn is King and wheat the Staff of Life it has been for hundreds of years a favorite among the vegetables. But that has t always been so. The sweet potato has spread over the entire tropics and. sub-tropics within the last four hundred years. Whence it came is a much discussed question. There are two opinions regarding its origin, one that it is American, the other that it is Asiatic. De Candolle, after summing up the arguments in favor of both, concludes that it is probably American, but does t commit himself. He has often been criticised as basing his opinion upon inadequate evidence. With a view to ascertaining what conclusions the evidence at hand really warrants, the writer has briefly stated below De Candolle's principal arguments, with a few additional ones. The contention that the sweet potato is of Asiatic origin is based upon the following facts: 1. D'Hervey, Saint Denis (Rech. sur l'Agriculture des Chin., 1850, p. 109) states that the Chinese Encyclop. of Agric. speaks of the sweet potato and mentions different varieties long before the discovery of America. 2. Piddington (Index) claims that the sweet potato has the Sanskrit name ruktalu.3. Cook, on his first voyage around the world in 1769, found sweet potatoes cultivated at Tahiti, and in 1770 large plantations of them in New Zealand. (Low, Cook's Three Voyages Around the World, pp. 45, 76). Forster (De Plantis Esculentis, p. 56) in 1783 describes Convolvulus chrysorhyzus as being cultivated there, which Hooker (Handbook of N. Z. Flora) identifier as the sweet potato. Pickering (Chron. Hist, year 1273) states that he saw varieties unkwn in America cultivated on Metia, Tahiti, the Hawaiian, Samoan, and Tonga Islands....