some places mixed with much gravel, consisting of limestone, marl, sandstone, clay slate, and quartz rock, or of such rocks as enter into the composition of the surrounding ranges of mountains, viz., the Sewalick range to the south, and the Himalayas, properly so called, to the north, From the above statement, we find that the tea-plant thrives well both in stiff and free soils, and in many modifications of these. But the soil which seems best adapted to its growth may be styled free soil, as at Russiah, or a mixture of both, as at Kaolagir, in the Deyrah Dhoon. In limestone districts, where the tea has been tried, if the super-imposed soil has been thin and untransported, and this proved from the decomposition of the subjacent rock, the plant has generally failed; and this has been particularly the case where the limestone, by plutonic action, has become metamorphic. These districts, therefore, in forming plantations, are to be avoided. From the writings of various authors, it appears that the districts where the tea-plant thrives best in China, have a geological structure very similar to that met with in many parts of the Himalayas, being composed of primitive and transition rocks. _Altitude above the sea best suited to the tea plant_.--To state what altitude is best adapted to the growth of the tea-plant, and for the production of the best kinds of tea, will require much more observation. At present the tea-plant thrives equally well at Kaolagir, in the Deyrah Dhoon; at Russiah, in the Chikata district; at Huwalbaugh; at Kuppeena and Lutchmisser; and at Rumaserai, or at heights ranging from 2,200 feet above the level of the sea to 6,000 feet. Moreover, the tea manufactured from leaves procured from Kaolagir, has been considered by the London brokers equal to that made from leaves procured from Lutchmisser and Kuppeena.