A CEMENT RESERVOIR.
The annexed figures represent, on a scale of 1 to 50, a plan and vertical section of a reservoir of beton, 11 cubic meters in capacity, designed for the storage of drinking water and for collecting the overflow of a canal. The volume of beton employed in its construction was 0.9 cubic meter per cubic meter of water to be stored. The inner walls were covered with a layer of cement to insure of tightness.
A CEMENT RESERVOIR.
T is the inlet pipe, with a diameter of 0.08 m.
T' is the distributing pipe, and T" is the waste pipe.—Annales des Travaux Publics.
MACHINE FOR GRINDING LITHOGRAPHIC INKS AND COLORS.
The grinding of the inks and colors that are employed in lithographing is a long and delicate operation, which it has scarcely been possible up to the present time to perform satisfactorily otherwise than by hand, because of the perfect mixture that it is necessary to obtain in the materials employed.