Publisher's Synopsis
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1836 edition. Excerpt: ... To make this explanation more easy, we will imagine two hollow vertical cylinders of very, different sizes, communicating with one another by any means whatever. A moveable stopper, which we suppose to have the form of a solid cylinder, enters into the larger cylinder, exactly fitting it. In the interior of the small one is a piston, having an arm of a lever. If, the two cylinders being full of water, a pressure is exerted by means of the arm of the lever and the piston on the surface of the fluid in the small cylinder, this pressure will be transmitted to the fluid of the larger, increased in proportion to the volume of the two cylinders. Thus, if the contents of the larger cylinder is one hundred times that of the small, the pressure on the surface of the first will be one hundred times'that which was exerted on the other. This being well understood, it is easy to calculate the action of a hydraulic press. If the two cylinders being full, a new quantity of water is made to enter by means of a small forcing pump put in play by the same lever which gives the pressure to the small piston, this water, pressing from all sides, will raise the moveable stopper in the large cylinder which raises to the upper part the plate of the press. This kind of press, which offers great advantages, has been adopted in all the factories where considerable pressure is required. Whatever press, in fine, any one has at his disposal, one of the most important points is, that it work quick, and that the interval between the rasping and the pressure should be the shortest possible, so that the juice should not undergo any change. The pulp, in order to be passed through the press, is enclosed in bags of strong cloth, but not too close for the liquid to escape...
