" This boiler, which is placed in the hind boot, consists of two or three series of pipes of an inch bore, bent into the form of a horse-shoe, and supporting the fire-grate at their upper and lower extremities, with two horizontal tubes of larger dimensions, into which the open ends of the before-mentioned smaller bent tubes enter and are fixed; and the two large horizontal tubes are connected by a series of ten open vertical pipes. The whole of the bent tubes, the lower straight horizontal tube, and the half of the upper one, (which may be termed a steam reservoir,) are kept filled with water. From the to of the steam chamber proceed two curved pipes, which enter two large vertical tubes of strong plate-iron, strengthened by hoops externally ; these last are called separators; they communicate at their lower ends with the boiler, and at their upper ends by a connecting tube, from which a branch enters the chimney, and passing over the top and down the back of the furnace, is carried through the air pas sage, along through the fore boot, and back again as far as the centre of the carriage, where it is connected with two horizontal cylinders, firmly secured between the main perches, and serving to give motion to two cranks on the axis of the hind wheels, by which means the carriage is impelled.
"The steam is worked expansively, being shut of the stroke by means of &slide valve, the rod of which is worked by a cam on the axis of the hind wheels. The slide valves, by which the steam is admitted to the cylinders, are worked by a lever, on the axis of which is fixed an elliptical ring; and to reverse the motion, a line is attached to the rod, and placed within reach of the coachman ; by pulling this line, the pin is brought into the upper notch, and the motion of the carriage thereby reversed.
"Beneath the main perches is placed the tank, for the supply of the boiler; it communicates (by pipes from its lower part) with the force-pump beneath the fore boot, and also with a small forcer placed within reach of the fireman who site behind the boilers Immediately above the tank is a fiat vessel through which the steam passes from the eduction pipe, and thence by another pipe into the chimney.
"The pipe from the force-pump passes through the air-chamber, and forming a coil above the horse-shoe tubes, delivers the water into the upper part of the steam chamber. The supply from the pump may be diminished by partially opening a small cock, which allows a portion of water to return to the tank.
part of the preceding account that may appear abstruse to the reader, will be rendered perfectly clear by an inspection of the vertical section of the machine, represented on the next page,,together with a reference to the following explanatory letters.
"a a a, a series of small tubes, in two or more ranges, brining the boiler, the interior range serving to support the fuel ; these tubes are connected with b b, two larger tubes, the upper one forming a steam chamber; c, one of a range of tubes b b together ; 4 one of the two separators, connected with bb by two curved ppm; e e e, steam pipe proceeding from the upper part of the separator, and passing down through the chimney and beneath the of the carriage into the fore boot, whence it descends to f, the cylinders whit propel the carriage by means of cranks g, on the axis of the hind wheels; A, an eccen tric, which works the slide valve i by a lever turning an its centre, and to the extremities of which lever an elliptical ring k is attached; 11 a line, fastened at one end to an eccentric rod, and at the other and to a short lever in the fore boot, which may be elevated by means of the lever m • this raising the eccen tric rod, causes the pin in its extremity to act upon the upper side of k, and thus reverse, the motion of the carriage ; n, lever for regulating the throttle valve o; p, eduction pipe, opening into a fiat chamber q m which the steam expands, and thence passes through the waste pipe r r into the chimney 8 ; t, tankfor water ; u, force-pump, supplied by the suction-pipe v, and forcing the water through the pipe x x r, (which forms a coil above the boilers,) into the tubular boilers a a a ; y, a stop-cock, by which the supply from the force-pump is regulated, any requisite portion being allowed to return into the tank ; a seat for the fireman ; 1, a blowing-machine, or frame driven by bands from the axis of the fly-wheel 2, which is worked by a small engine 3, serving also to work the force-pump u ; 4 4 4, steam-pipe, supplying the engine 3; 5 6, air channel, leading from the blower to the furnace ; 6, guide-wheels, which may be placed obliquely to the perch 8, by the lever 7 ; 9, centre of motion on which the perch 8 turns, thus turning the fore-wheels, on the axis of which are springs that support the fore part of the coach ; 11, force-pump, to supply the boilers, in case the water is too low to be worked by the fireman."
The multifitrious and unnecemary contrivances in this apparatus forcibly reminds us of the man who employed a very common machine in his btudnessa, but who (being a "genius") took it into his head to disguise the simplicity of Its working parts, by the addition of a great number of wheels and pinions, that he might, through their instrumentality, make a noise in the world. Although the preceding sectional drawing exhibits a faithful and clear outline of the " miraculous mvention," there are of course many subordinate parts which are not introduced, to avoid a confusion of lines in the figure ; enough are, how-. ever, left to surprise every mechanical reader, that such absurd additions should ever have entitled the author to the adulation of the press, and of some of our best parliamentary orators. It would be a waste of time to do more than just draw the reader's attention to a portion of the " happy series." First and foremost are the "pilot-wheels," ;already noticed in a previous page ; next, under the fore boot, is exposed to the admiring gaze of the multitude a pretty little steam engine, with all appurtenances thereunto belonging, employed to raise the wind (in both senses of the term) and to cool the steam pipe ; which pipe, it will be observed, after proceeding from the separators, makes a flourish over the boiler to get a little warmed, then descends in a graceful curve under the body of the carriage, and through the cold air-trunk, to get a little cooled in its complaisant journey to the coachman's feet : hence it makes a Moor amongst the fanners, in order that the steam may be sufficiently condensed to run down into the engines, which are placed in the coolest possible situation, except when they happen to be covered with the non-conducting substances of quartz, silex, felspar, and mica,•athered from the road ! It was for such patented contrivances as these, and those before described, that Mr. Gurney, or his friends in parliament, sought to obtain an extension of his patent rights, or a compensation in money for giving the public the entire benefit of his " sublime inventions!" On the latter proposition we have never made a single remark, nor is it our intention to do so ; but of the former we cannot resist the expression of our rooted conviction, that an extension of Mr. Gurney's patents is unwished for, even by himself, because there is not a single contrivance of the whole " happy series' which any mechanic would be mad enough to use, or rather try to use, were they freely offered to him.