Equally amusing are the efforts of James Smith of Seaforth, Liverpool, and Sidney Arthur Chease, Liverpool, gentlemen: These two co-laborers applied for British patents on four different Hydro-mechanical devices--one in 1858, two in 1863, and one in 1865. On three they obtained patents, and on the other one provincial protection. One of them seems to have been a capitalist, and the other one a machinist. Their models were complicated beyond understanding, and apparently they were laboring in the dark without intelligent plan. They seemed to have thought that when a complicated mess of machinery parts and fluid were assembled Perpetual Motion must somehow result. Nothing could be gained by setting forth their inventions fully, but their labors were so great, and their efforts so intense that we feel like preserving their names from oblivion, and hence we give them mention here. Why Hydraulic and Hydro-Mechanical Devices for Obtaining Perpetual Motion Failed to Work Next to wheels and weights, the use of liquids in a hydraulic, hydrostatic, or hydro-mechanical manner have been sought to be utilized by Perpetual Motion seekers as a means of obtaining energy from the machine not supplied to the machine. The foregoing are only a few of the many devices of that kind, but they are the most simple of those that have been brought to light, and consequently better illustrate the manner in which it has been sought to utilize the interesting properties of liquid pressure and mobility in the solution of the problem. An examination of the preceding devices discloses that in each case the inventor sought by the energy of the descent of a liquid to elevate through the same distance of ascent the same or a greater quantity of the same liquid, or in some cases to obtain from the pressure of a liquid a greater force than is required to expand a bag, bellows or vessel, submerged the same distance below the level. The impossibility of all of these schemes is apparent from the same reasoning that is applied to illustrate and show the impossibility of obtaining Perpetual Motion by the use of wheels, weights, levers and the force of gravity.