Mexico, like other Western American states, is a country whose agriculture depends much upon artificial irrigation. Whilst much good work has been carried out in this field, much remains to be done; and the want of irrigation works is almost as serious a drawback as the want of labour. The singular topographical formation of Mexico has robbed it of natural irrigation facilities--steep slopes facing the oceans and a high riverless plateau war against the retention and absorption of the rain-waters, and the run-off is consequently excessively rapid. Nevertheless proper storage of water in reservoirs during times of heavy rain, especially upon the great plateau, could accomplish much, and such enterprises should be exceedingly profitable, for, in certain regions, water is almost "worth its weight in silver." In another place I have made mention of the irrigation system of the River Nazas, which may be compared to the Nile on a small scale. The waters of this river, in times of normal flow, are entirely exhausted by the numerous irrigation canals which lead therefrom, traversing the plains for many miles, and conducting water to the large cotton plantations for which the region is famous. This region is known as "La Laguna," and its great area and depth of fertile soil are the result of an ancient lake-basin. So valuable is the water here that not many years ago feuds were common between the large cotton-growers of the district, who continually strove to deprive each other of the water in order to benefit themselves. Blowing-up of diverting dams and weirs with dynamite even took place, and things reached such a pitch that the Government were obliged to step in and establish a controlling "River Nazas Commission," under whose administration a proper regimen of the waters and irrigation system was enforced. Among the great estates of this region may be mentioned that of Tlahualilo, with which British enterprise is connected. The canal belonging to this company is some fifty miles long, and has a large flowing capacity, and there are numerous others of less volume. I spent some time in this interesting region, and so became acquainted with its peculiar conditions. The Nazas rises in the mountains, and has no outlet to the sea, as elsewhere described; and, dry in the dry season, its bed becomes a raging flood in the wet, a spate or wave of water filling it up from bank to bank, 300 feet wide, in half an hour. This great flood principally runs to waste in the Parras lagoon, and were its waters diverted and stored at higher elevations they would be of incalculable value in the increase of the available cotton-growing area. A project is on foot at present for a work of this nature, a barrage on the Nazas.