_The Pump_ (Figs 1, 5 and 6)--This consists of a cylindrical chamber, P, of bronze, bolted to a bracket on the frame, and cast in a piece, with the suction valve chamber, P, in which the valve, p, plays. It is surmounted by the distributing valve chamber P squared. This latter is held by means of two nuts screwed on to the extremity of the rods, p cubed, connected with the shell, E, of the distributing-cock, E. In the shell, E, terminates, on one side, the pipe, p, through which enters the gas from the washer, and, on the other, the pipe i, that communicates with a feed-reservoir not shown in the cuts. The cock E, permits of the simultaneous regulation of the entrance of the gas and water. Its position is shown by an index e, passing over a graduated dial, _eš_. From the distributing valve chamber, P squared the pipe, s, leads the mixture of water and gas under pressure into _The Saturator_, S (Figs 1, 7 and 9)--This consists of a large copper vessel, s, affixed to the top of the frame through the intermedium of a bronze collar h, and a self closing bottom H. This latter is provided with two pipes, one of which, s, leads the mixture of water and carbonic acid forced by the pump, and the other, b, communicates with the siphons or bottles to be filled. The pipe, b, is not affixed directly to the bottom, but is connected therewith through the intermedium of a cock, r. The object of the broken form of this pipe is to cause the pressure to act according to the axis of the screw, r, which is maneuvered by the key, r squared. The water under pressure, having been forced into the vessel, S, is submitted therein to an agitation that allows it to dissolve a larger quantity of gas. Such agitation is produced by two pairs of paddles, J J, mounted at the extremity of an axle actuated by the wheel, A, through the intermedium of gearings, g and g. The course of the operation in the saturator may be followed by an inspection of the water level, n, seen at the front and side in Figs. 2 and 3. This apparatus, in which the pressure reaches 4 to 6 atmospheres in the manufacture of Seltzer water or gaseous lemonade in bottles, and from 10 to 12 atmospheres in that of Seltzer water in siphons, is provided also with a pressure gauge, m, and a safety valve, both screwed, as is also the tube, n squared, into a sphere, S, on the top of the saturator. _Apparatus for Using Carbonate of Lime_ (Figs 2, 3, and 10)--When chalk is acted upon by sulphuric acid, there is formed an insoluble sulphate which, by covering the chalk, prevents the action of the acid from continuing if care be not taken to constantly agitate the materials. This has led to a change in the arrangement of the generator in the apparatus designed for the use of chalk.