Colonel Jones has done more than anyone else living to establish correct views on sewage farming, and he has lately changed the Government sewage marshes at Aldershot into a veritable “Garden of Eden,” watered by the waters from Aldershot Camp, growing healthy crops, and causing not the slightest nuisance. After many struggles, even the milk from the dairy cows is now recognised as good and supplied to the military hospitals. This is an achievement of which anyone might be proud; and all those who have been over the farm during the time of the “deluge,” and can now study the order and system evolved out of chaos by Colonel Jones will testify to this! It is pleasant to record that the War Office have recognised Colonel Jones’ work for them by having appointed him quite recently to manage all the sewage disposal works in the Aldershot district. This will involve the laying out of irrigation works in eight separate places, in some of which artificial methods of sewage purification have been tried and found wanting. Before commencing with my task proper it may not be out of place to describe here very shortly the various stages through which the sewage question has passed during the century just closed. Such a retrospect is of general interest and may throw some further light upon our subject; it must of necessity be short, otherwise it would absorb more time and space than is at my disposal, and any shortcomings in this respect that the reader may discover, I trust he will kindly put down to this cause. “The man in the street” seems year after year more called upon to form an important element in settling questions even of a scientific nature, and if what I am going to say should prove of some service to him my labours will be well repaid. II. THE SEWAGE QUESTION DURING THE LAST CENTURY. A SHORT RETROSPECT. In dealing with the sewage question during the last century, it will be an advantage to distinguish between the theory and practice of sewage purification, as such a division of the subject will render it less complicated and will tend to avoid misconceptions. Dealing first with the theoretical side of the question, it is very doubtful whether at the dawn of the century even a working hypothesis existed to explain the process of sewage irrigation which was then adopted in one or two instances, notably at Edinburgh, where the town sewage was very successfully purified on the Craigentinny meadows. It is more than likely, that at this time instinct took the place of theory, and that sewage irrigation was an instinctive imitation of irrigation with river water employed for many centuries in some eastern countries.