The general distribution is effected from the eighteen reservoirs fed by these various sources; the eau de source is furnished on the public streets by six hundred and seventy-three fountains established against walls, etc., and by ninety-seven of the "Wallace fountains;" the water of the Ourcq and of the rivers is furnished by thousands of _bouches d'eau_, on the sidewalks, in the streets, etc., for service in case of fire, watering the streets, the innumerable lavoirs, etc. The monumental fountains, such as those of the Place de la Concorde and du Châtelet, which play every day from ten in the morning to six in the afternoon, are furnished by the canal de l'Ourcq, whilst that of the Trocadéro and its cascade, that of the Place d'Italie, and the luminous fountain of the Champ de Mars, which function only on fête-days and Sundays, are supplied by the Seine water. The fountains of the Luxembourg are fed by the Arcueil aqueduct. The water-pipes throughout the city are generally carried in the upper part of the égouts,--on curved shelves in the smaller ones, and on upright stems carrying a curved holder in the larger ones. In the grand _galerie du Boulevard Sebastopol_, for example, the water of the Ourcq is carried on one side in an eighty-centimètre main, and that of the Seine on the other in a main one mètre, ten, in diameter. [Illustration: MUNICIPAL PARIS: POST OF THE OCTROI AT THE BARRIÈRE DE LA CHAPELLE SAINT-DENIS. After a drawing by G. Maréchal.] When the canal de l'Ourcq was first opened, the work was carried out by a company to which was granted the right of navigation on the new channel, connected with the Seine by the canals Saint-Martin and Saint-Denis, but in 1876 the city of Paris repurchased this concession from the canal company. A supply is also drawn from several important artesian wells in different localities,--that of Grenelle, in the Place de Breteuil, driven between 1833 and 1852, draws the water from a depth of five hundred and forty-nine mètres and elevates it to a height of seventy-five. This supply is turned into that of the Ourcq. The artesian well of the Butte aux Cailles, begun in 1863, was resumed in 1892 and is just being terminated; the depth attained is some six hundred mètres. That of Passy, 1855-1860, somewhat less deep, supplies the lakes of the Bois de Boulogne; that of the Place Hébert, 1863-1893, seven hundred and eighteen mètres in depth, furnishes some large ponds in the neighborhood.