The machine works very simply, and almost noiselessly; it is exceedingly handy, and is directed by one person; is very portable; occupies but an inconsiderable space, and does work precisely of the same description as No. 1, though of inferior dimensions in all respects. [Illustration: =NO. 7.--FAIRMAN’S UNIVERSAL CHUCK.=] A Chuck generally is explained as being a round plate, which is fastened on to the spindle of a lathe--see No. 5--and is used to bore holes in round or variously shaped plates of metal. It will be observed, in the cut above, that all the upright studs converge toward the centre by one motion of the lever, so that the centre of the article to be bored must correspond with the centre of the spindle. Besides all sorts of plates, as above mentioned, the centres of gear wheels and pulleys are bored by it. There is a beautiful principle involved in the action of this chuck, though its novelty is in some sort lost in its simplicity. Here, by a simple movement of the hand, the article to be worked is brought to its proper position; while, by the old method, the same position could only be arrived at after a series of trials; nor, in the end, is the article so firmly held, after its correct place shall have been ascertained. The last representation we shall offer to our readers is the subjoined cut of an improved borer for the wheels of railroad cars. The extreme simplicity of its general arrangements is its most conspicuous feature, and the small space it occupies is another highly important consideration. It will chuck all sized wheels up to three feet diameter, and can bolt on wheels of yet larger dimensions. In the cut, a car-wheel is shown set on the machine; the upright spindle which passes through it contains the cutters, and is driven by the pulley shown on the left side of the machine, which gives to the spindle-lathe its rotary and alternate motion. The brief account here given of these very ingenious and simple machines will, it is hoped, answer the desired end of conveying to the general reader some idea of the principles of operation, the perfection, and the immense general utility of these most emphatically labor-saving engines. We say emphatically labor-saving, because they not only spare and simplify labor by their own direct operation, but indirectly do so fifty or a hundred fold, because they are applied to the creation of those vast space-and-time-annihilating machines, which in the present day surpass the wildest and most marvelous legends of Fairy-land, of necromancers and magicians, as to the powers--incalculable and almost ubiquitous--which they bestow on their possessors, and which create wealth for the countries having sons expert to invent and use them, surpassing the gold of Ophir, and the gems of Golconda. [Illustration: =NO. 8.--FAIRMAN’S BORING MACHINE.=] * * * * * =FORGOTTEN.=