The province of Maldonado contains copper, iron, marble, gypsum, sulphur, and slate, and here, too, the mineral field has remained almost unexploited up to the present. Montevideo holds manganese and iron, Salto copper, Florida iron, Paysandú copper, and San José asbestos. These, at all events, constitute the principal centres of the minerals specified, although there are others of comparative insignificance in many other districts. Uruguay, too, is by no means without its precious stones. Odd rubies and diamonds have been met with from time to time, and the jasper and agate are fairly common. The stones, however, that obtain in really considerable numbers, and that are consequently of the chief commercial interest, are the amethyst and the topaz. Of both these some magnificent specimens are to be met with in the Province of Artigas. These very handsome stones are now attaining a distinct popularity amongst the visitors to Montevideo. To those who have not the opportunity of visiting the remote province of Artigas itself, it may be mentioned that Agosto Wild, in the Calle Veinte Cinco de Mayo in Montevideo, is a most trustworthy and reliable dealer. A peculiarity of Uruguay is the water-stone that is met with in the neighbourhood of Salto. This consists of a rounded portion of stone, more or less knobbly and opaque or smooth and transparent as the case may be. In the latter the water that is enclosed within it is almost as plainly seen as though it were held within rather dull glass, and with every movement of the crystal-like material the motion and bubblings of the water are very clearly evident. There have been some mental gymnastics ere now concerning the advent of the apple within the dumpling: but the presence of this water within the stone suffices to puzzle the more scientific minds. So far as I am aware, no adequate explanation of the phenomenon has yet been vouchsafed. Viticulture is one of the more recent industries of Uruguay. It has now, however, obtained a firm hold, and the future of the commerce is distinctly promising. It was as late as 1860 that the first tentative plantings of the vine occurred, and it was not until 1875 that a couple of really important vineyards were established, one at Colon and the other at Salto, in the north-west of the republic. Even then the undertaking did not meet with immediate success, and it was some while ere the type of plant was discovered that would lead to the most favourable results in the local soil. This, however, once discovered, the progress of viticulture has proceeded almost without a check. The rapidity of its increase may be gathered from the following figures. In 1880 the number of vineyards in Uruguay was 16; in 1890, 181; whereas in 1895 the total had swollen to 748. Since that time the industry has continued to spread. Thus in 1897 the vineyards had increased in number to 824, while in 1905 the viticultural census showed the very respectable total of 1,453.