Much good might be achieved by a more enlarged operation of these works. The water is capable of being made fit for all domestic purposes, thus obviating the necessity for cisterns, the birthplace of millions of moschetoes, and, possibly the source of much sickness. For the purposes of bathing it is almost indispensable; and, for forming fountains, to cleanse the streets and to purify and cool the air, it may be rendered equally a convenience, a luxury, and an embellishment. ARMORIES A room has been fitted up in Camp street, for which the substantial and well constructed walls of the old Camp street Theatre have been used--a building erected by James H. Caldwell, Esq., in 1822. This apartment, used as an armory for the Washington Battalion, is sixty by one hundred and twenty feet, and twenty-two feet high, and is decidedly one of the largest in New Orleans. Another armory is located at the corner of Perdido and Baronne streets, in the upper part of the Carrolton Rail-Road depôt. Both of these armories are the depositories of arms, all kept in the best order, and disposed in various tasteful forms. THE FIRE DEPARTMENT There are in New Orleans, fifteen engine, three hose, and one hook and ladder--in all nineteen companies. The city may justly boast of the energy and efficiency of this arm of safety. The members are exempt from military and jury duty; and, after a certain term, are enrolled as honorary members, who are free from the performance of further service. The expenses of the department are defrayed by appropriations from the municipalities, and from fines imposed upon delinquent members. The courage and bearing of these companies during a conflagration, are much to be admired. They proceed with that cool and determined spirit that shows a consciousness of their power in subduing the destructive element. An excellent and convenient supply of water, which is always at command, enables them promptly to extinguish the most dangerous fire. MANUFACTURES In New Orleans, have, until recently been but little known. There are now however, several actively employed and well patronised branches of the manufacturing business; which, if not calculated to compete with those in other markets, answer a very good purpose for its own. THE IRON FOUNDRY Of Messrs. Leeds & Co. produces every variety of machinery, that steamboats and manufactories require for extensive operations. It has been established many years, at the corner of Foucher and Delord streets, occupies nearly a whole square, and is on as extensive a scale as any in the country. The business-like and prompt system practiced by the conductors, is known to all who require their aid upon the whole line of the Mississippi and its tributaries. STEAM PLANING MILL Upon Carondelet Walk, has been in successful operation over four years. Lumber is landed from Carondelet Canal, which passes in front of the building. STEAM SAW MILLS