"The carriage is constructed &r accommodating six inside and fifteen outside passengers, independently of the guide, who is also the engineer. In front of the coach is a very capacious boot, while behind, that which assumes the appearance of a boot, is the case for the boiler and the fhrnace, from which no inconvenience is experienced by the outsidepassenger,. although, in cold weather, a certain degree of heat may be obtaineil, if required. The length of the vehicle, from end to end, is 15 feet, and, with the pole and pilot wheels, 20 feet. The diameter of the hind wheels is 5 feet; of the &int wheels, 3 feet 9 inches • and of the pilot wheels, 3 feet. There is a treble perch, by which the machinery is supported, and beneath which two propellers, in going up a hill, may be set in motion, somewhat similar to the action of a horse's legs under similar circumstances, which assist in forcing the carriage to the summit.
"In descending a hill, there is a break fixed on the hind wheel, to increase the friction • but, independently of this, the guide has the power of lessening the force of steam to any extent, by means of the lever at his right hand, which operates upon the throttle valve, and by which he may stop the action of the steam altogether, and effect a counter vacuum in the cylinders. By this means also he regulates the rate of progress on the road. There is another lever by which he can stop the vehicle instanter, and in a moment reverse the motion of the wheels, so as to prevent accident, as is the practice with the paddles of steam-vesssele. The duty of the guide, who sits in front, is to keep the vehicle in its proper course, which he does by means of the pilot wheels acting upon the pole.
"The total weight of the carriage and all its apparatus is estimated at owe and a half ton, and ita wear and tsar of the road, as compared with a comb's drawn by four horses, as one is to six. The engine has a twelve-horse power, but may be increased to sixteen : the actual power in use, except in ascending a hill, is eight horses.
lify. l gives a side view of the machine ; a the guide and engineer, to whom the whole management of the machinery and conduct of the carriage is entrusted. Besides this man, a guard will be employed, whose duty it will be to look after the luggage and passengers ; b the handle, which guides the pole and pilot wheels ; c the pilot wheels ; d the pole ; e the fore boot, for luggage ; f the throttle valve of the main steam pipe, which, by means of the handle, is opened or closed at pleasure, the power of the steam and the progress of the carriage being thereby regulated, from one to ten or twenty miles per hour ; g the tank for water, running from end to end, and the full breadth of the car riage ; it will contain sixty gallons of water; h the carriage, painted claret colour, and lined with cloth of the same hue, capable of holding six inside and twelve outside passengers ; i the hind boot, containing the boiler and furnace ; it is encased with sheet iron, and between the pipes the coke and charcoal are put, the front being closed in the ordinary way (as seen in Fig. 2), with an iron
door. The pipes extend from the cylindrical reservoir of water at the bottom, to the cylindrical chamber for steam at the top, forming a succession of lines something like a horse-shoe turned edgeways. The steam enters the ' separa tors' through large pipes, and is thence conducted to its proper destination ; k k separators, in which the steam is separated from the water, the water descending and returning to the boiler, while the steam ascends and is forced into the steam pipes of the engine ; 1 the pump by which the water is pumped from the tank, by means of a flexible hose, to the reservoir communicating with the boiler; as the main steam pipe descending from the separators,' and proceeding in a direct line under the body of the coach to the ' throttle valve,' and thence, under the tank, to the cylinders ; a a flues of the furnace, four in number ; o the perches, of which there are three, conjoined, to support the machinery ; p the cylinders there is one between each perch ; q valve motion, admitting steam alternately to each side of the pistons; r cranks operating on the axle ; at the ends of the axle are ratchets which, as the axle turns round, catch projecting pieces of iron on the boxes of the wheels, and give them the rotatory motion—the hind wheels only are thus operated upon ; a propellers, used as the carriage ascends a hill; t the drag, which is apphed to increase the friction on the wheel in going down a hill; this is also assisted by diminishing the pressure of the steam, or, if necessary, inverting the motion of the wheels ; a the clutch, by which the wheel is sent round ; o the safety valve, which regulates the proper pressure of the steam in the pipe ; w the orifice for filling the tank ; this is done by means of a flexible hose and a funnel, and occupies but a few seconds. Fig. 2 exhibits a back view of the carriage, and the perches that support the machinery, not here introduced ; a the furnace door ; c gauge cock ; d blow cock ; e e steam pipes; ff flues to furnace ; g g the pipes through which the water is propelled from the separators It It into the boiler.