it commonly is, with the salts and double salts formed by the union of the organic acids with the inorganic bases of alkalies, earths, and oxides which have become soluble, and been brought to the surface from below by capillary attraction. I may also mention, that the basaltic plateaux upon the sandstone rocks of Central and Southern India are often surmounted with a deposit, more or less deep, of laterite, or indurated iron clay, the detritus of which tends to promote fertility in the soil. I have never myself seen any other deposit than this iron clay or _laterite_ above the basaltic plateaux. I believe that this laterite is never found, in any part of the Himmalaya chain. I have never seen it there, nor have I ever heard of any one having seen it there. In Bundelkund and other parts of Central and Southern India, the basaltic plateaux are sometimes found deposing immediately upon beds of granite. The doomuteea is of a light-brown colour, soon powders into fine dust, and requires much more outlay in manure and labour than the muteear. The oosur soil appears to be formed out of both, by a superabundance of one or other of the salts or their bases, which are brought to the surface from the beds below, and not carried off or taken back into these beds. It is known that salts of ammonia are injurious to plants, unless combined with organic acids, supplied to the soil by decayed vegetable or animal matter. This matter is necessary to combine with, and fix the ammonia in the soil, and give it out to plants as they require it. It is possible that nitrates may superabound in the soil from the oxydizement of the nitrogen of a superfluity of ammonia. The people say that all land may become _oosur_ from neglect; and when _oosur_ can never be made to bear crops, after it has been left long fallow, till it has been flooded with rain-water for two or three seasons, by means of artificial embankments, and then well watered, manured, and ploughed. When well tilled in this way, all but the very worst kinds of _oosur_ are said to bear tolerable crops. In the midst of a plain of barren oosur land, which has hardly a tree, shrub, or blade of grass, we find small _oases_, or patches of low land, in which accumulated rain-water lies for several months every year, covered with stout grasses of different kinds, a sure indication of ability to bear good crops, under good tillage. From very bad _oosur_ lands, common salt or saltpetre, or both, are taken by digging out and washing the earth, and then removing the water by evaporation. The clods in the muteear soil not only retain moisture, and give it out slowly as required by the crops, but they give shelter and coolness to the young and tender shoots of grain and pulse. Of course trees, shrubs, and plants, of all kind in Oude, as elsewhere, derive carbonic acid gas and ammonia from the atmosphere, and decompose them, for their own use, in the same manner.