Besides, in more northern countries we find here and there quite an extensive cultivation of aromatic plants; this is the case, for instance, in England, where lavender, crisp mint, and peppermint are planted on a large scale solely for their perfume. In northern Germany, too, we sometimes find caraway and sweet flag cultivated, for their peculiar odors only, in special fields. As stated above, the place of growth of a plant exerts a powerful influence on the quality of the odors developed in it; this circumstance may be the reason why certain scents are prized most highly when they are derived from some definite regions, because the buyer is sure that the product from such places is of superior excellence. Thus we find that English oils of lavender and peppermint are valued more highly and bring better prices than those from other points of production; some places even have, as it were, acquired a monopoly of certain odors. While the factories at Cannes produce the most perfect odors of roses, orange flowers, jasmine, and cassie, those at Nice are famous for the finest odors of violet, reseda (mignonette), and tuberose, and those of Italy for the odors of bergamot and orris root. Unfortunately there are in the United States no extensive places of cultivation for odoriferous plants, although certain localities are very well adapted to the growth of violets, mignonette, roses, syringa, lavender, etc. Peppermint, however, is grown on a large scale in some parts of New York State and in Michigan. Of course such an enterprise, in order to be profitable, requires the intelligent co-operation of planters and duly qualified chemists, besides well-furnished laboratories and a considerable amount of capital; but under these conditions the prospects of gain are good. At present the manufacturers of perfumery are almost entirely dependent upon English and French factories for their supply of odors. Owing to the absence of competition, the prices for the products, excellent though they are, are high, and become still more so when the crops are short. These conditions would be materially altered under active competition. As indicated above, the odors used in perfumery may be divided into three distinct groups according to their origin. These groups are: 1. Odors of vegetable origin. 2. Odors of animal origin. 3. Odors of artificial origin—chemical products.