Somewhat of a modification of this process is what is known as “Brown’s System of Street Watering,” which may be described as follows:--A lead pipe is laid in the footpath at the back of the kerb on each side of the street to be watered, small gratings or shields being fixed in the pipe at intervals of twelve inches, and the remaining space filled with asphalte; small holes are then bored in the pipe through the openings in the shields. The pipe is connected with the water main in the street, and is provided with the necessary stopcocks, &c. On the water being turned on, fine jets are thrown in different directions upon the surface of the street. The width of roadway that can be watered by this process depends upon the pressure of the water, but it may be fairly assumed that in most towns streets of fifty feet width could be effectually watered in a few minutes by a pipe on each side of the street. This process has not gained much favour hitherto, principally on account of the large first cost involved, which would amount to upwards of 800_l._ per mile of street, but the expense afterwards should not much exceed the wages of one man at about 3_s._ 6_d._ per day to manipulate the necessary work, and the interest on the outlay and depreciation of the pipes, &c. The other objections to this system are:-- (1.) The liability of the pipes and perforations to get out of order, especially when allowed to lie idle for so many months in each year. (2.) The unpleasantness to pedestrians which must be caused whilst the watering is proceeding. (3.) The inconvenience to the traffic during the process. (4.) The effect upon the water by high winds, when in all probability it would be blown back across the foot pavement. (5.) In very broad streets it would be inoperative. In Paris and other continental cities, and also in several towns in this country, the watering is effected by hose and reels, or by portable iron tubes. Mr. Parry, C.E., the Borough Surveyor of Reading, has given the following particulars of the system of hand watering adopted in that borough, in which he gives the cost, and describes the utility of that method as compared with the use of water carts: A water cart (he states) will water twice a day a superficial area of 23,849 yards, and for a length watered one width that means 5,962 lineal yards, or for a double width 2,981 yards, the cost per day of laying on being as follows:--Horse, cart, and man, 8_s._ cost of maintenance of cart, harness, shoeing, &c., 1_s._ 5_d._, making 9_s._ 5_d._ per day. With respect to the hand machines he states that he has one of Headley’s drum machines, and three of special make, somewhat similar to those used in Paris. They are equal in point of work; and one machine will water 23,740 square yards twice a day, which, it will be observed, is very close to the amount of work performed by a cart.