The object of the machine represented in the engraving is to facilitate the laborious operation of rock drilling for blasting or splitting, which is frequently done by hand. The machine is portable and may be readily transported from place to place in an ordinary farm wagon. The base is a rectangular frame of timber, to which is hinged at one end a double upright, each side of which is longitudinally slotted and the two parts of which are connected at the top by a cross piece. To the other end of the base two quadrant guides are bolted, the other ends of which pass through ears on the cap of the upright which may with its appurtenances be inclined at any required angle, and held by pins passing through the ears and through corresponding holes in the curved guides. All the operating machinery is sustained on the upright frame. A hollow lieadstock extends horizontally across the face of the upright and is held securely in place, at any required point from the ground, by bolts passing through the vertical slots, and clamped by cam levers on the back of the uprights. The headstock may be raised or lowered by turning a shaft passing through and having its bearings in the head stock and carrying two pinions that mesh into fixed racks seated in the uprights. But it may be fed downward by means of a ratchet on the same shaft and a lever and spring pawl, the ends of which are seen in the engraving above the top of the machine. The raising or lowering of the headstock and its connections is aided by friction rollers attached to projections on the lower side and bearing ag-ainst the faces of the uprights. Depending from the front of*ifee lieadstock at a downward angle of about 45, is an arm, forked at its lower end and formed into two boxes for receiving the drill. These boxes are hinged so as to be readily opened to receive the drill. The arm also carries a shaft on its inclined portion, to the upper end of which is attached a bevel gear meshing with a crown wheel on the driving shaft. At its other end is a block, preferably of an octahedron form, that lifts and partially rotates the drill by impinging on a rubber disk on the drill, thus presenting the lips of the drill at a different angle at each blow. The main' shaft carries at one end a crank, or fast and loose pulley, as the machine is worked by hand or power, and at the other end a disk, on which are hung two, three, or four hammers, which in rotation strike the head of the drill, and the tangs ol which, when the hammer slides off the drill, strike against rubber buffers,springs,or their equivalent. From the foregoing the construction and opera- tion of this machine are suflSciently apparent. Patent ordered to issue June 15,1869, through the Scientific American Patent Agency. All communications should be addressed to the inventor, Wm. F, Banks, Brookfield, Conn. Improvement in Car Trucks This invention does away with the whole category of friction wheels, plates, rollers, swinging bolsters, heretofore employed in various combinations to allow the car to adapt itself without strain to the curvatures of the track. With all such devices or any combination of them the tendency to spread the track when the truck and car pass curves has never been completely obviated. The rolling stock, as well as the permanent way, has suffered from this defect, which the inventor of this truck claims he has entirely overcome, securing at the same time greater simplicity of construction and consequently diminished friction. In this truck the car bolster is suspended by swinging links in suitable brackets upon elliptical steel springs, attached to the car bolster as hereinafter to be described. By this arrangement the bolster may have a gentle radial as well as a slight lateral motion, so that easy adaptation to curves, and avoidance of strain and unnecessary friction between permanent way and rolling stock are secured. A novel form of crown plate is also employed to facilitate lateral play of the car bolster, and a certain device within the axle box placed there to counteract the jar which is caused by the uneveness of the track, which device will be more fully described further on. Fig. 1 is a perspective view of a four-wheeled freight-car truck. A is the car bolster ; B, the upper or female crown-plate ; and C, the lower or male crown plate. D is the frame of the truck; a portion being broken away to show fully the nature of tha devices by which the car bolster is suspended. The brackets, E, may be made of cast-iron, and the method of applying the links between them and the springs is so plainly shown in the engraving that further description of this portion of the invention is needless. The springs are let into the frame, D, and are kept from lateral motion by stout guide plates, F, rising vertically from the frame between each pair. Fig. 2, shows the device in the axle box above alluded to, the object of which is to counteract the jar from unevennesses in the road. It consists of spiral springs placed over the brass bearings in the axle boxes and secured between the bearing plates of the axle journals and upper seat-plates by means of fl&nged side plates, whose edges are turned over to engage with the folded or turned edges of flanges projecting from the bearing-plate and seat plate. The figure shows this part of the device very clearly. Fig. 3 is a transverse section through the male and female crown-plates. It will be seen that they are oval in form instead of being cylindrical like the crown plates of ordinary car trucks. This allows lateral play or motion of the truck in the line of the axles. The first thing that will attract the attention of practical men in regard to this truck is its extreme simplicity—the sine qua non in a good car truck. The principle of construction may be equally as well applied to six wheeled trucks, as to four-wheeled freight-trucks. Security from sliding, should cars get off the track, and consequent precipitation down embankments, is secured by limiting the radial motion of the truck—a desideratum, it is claimed, not before attained. In short to those acquainted with the requirements of a good car truck the general and detailed advantages secured by this improvement will become at once apparent upon examination. A patent was obtained upon this car truck February 16, 1869, by T. L. Wilson, assignor to Gyles Merrill and John W. Hobart. Further information can be obtained by addressing J. W. Hobart, St. Albans, Vt., or T. L. Wilson, Montreal, C.E,Herbert Spencer on the Patent Right Question One of the ablest thinkers of the age is Mr. Herbert Spencer , whose writings have perhaps had as much influence upon modern opinion as those of any living author. He disposes of the patent-right question as follows: As already remarked, it is a common notion, and on more especially pervading the operative classes, that the exclusive 66 use by itsiiiscoverer; of any new olinroved mode of production is a species of monopoly, in tlie sense in which that word is conventionally used. To let a man have the benefit accruing from the employment of some more efficient machine, or better process invented by him ; and to allow no other person to adopt and apply for his own advantage the same plan, they hold to be an injustice. Nor are there wanting philanthropic and even thinking men,who coiliiderthat the valuable idea orignated by individuals—ideas which may be of great national advantage—should be taken out of private hands and thrown open to the public at large. " And pray, gentlemen," an inventor may fairly reply," why may not I make the same proposal respecting your goods and chattels, your clothing, your houses, your railway shares, and your money in the funds ? If you are right in the interpretation you give to the term ' monopolyI do not see why that term should not be applied to the coats on your backs and the provisions on your dinner-tables. With equal reason I might argue that you unjustly 'monopolize' your furniture, and that you ought not in equity to have the ' exclusive use' of so many apartments If' national advantage * is to be the supreme rule, why should we not appropriate your wealth, and the wealth of others like you, to the liquidation of the state debt ? True, as you say, you came honestly by all this property, but so did I by my invention. True, as you say, this capital, on the interest of which you subsist was acquired by years of toil—is the reward of persevering industry : well, I may say the like of this machine. While you were gathering profits, I was collecting ideaH: the time you spent in conning the prices current was employed by me in studying mechanics; your speculations in new articles of merchandise answer to my experiments, many of which were costly and fruitless; when you were writing out your accounts, I was making drawings; and the same perseverance, patience, thought, and toil, which enabled you to make a fortune, have enabled me to complete my invention. Like your wealth, it represents so much accumulated labor; and I am living upon the profits it produces me, just as you are living upon the interest of your invested savings. Beware then, how you qiition my claim. If I am a monopolist,so also are you; so also is every man. If I have no right to these products of my brain, neither have you to those of your hands; no one can become the sole owner of any article whatever; and *all property is robbery.' "