. mates araannexed, marked AMERICJAN RAIL-ROAD JOURNAL. M__m__m_~~w 133 more to the direction of the radius of curvature of the road, giving greater effect to the cone, so that the resistance in curvatures, and in passing through tnrn-outs, will be much reduced. '1‘his ear works well, and the method bids fair to be a valuable im- provement. . Full effect should be given to this plan. and at the same time it should be ascertained whether both ends of the axles should be allowed to vibrate, or only one of them. Although this modification of the chilled box car with outside bearings, may ultimately enhance its , value, and bring it more nearly into competition with the Winans car as respects the amount of traction required. yet, further experience is iiecessary before their relative merits in all respects, and under all circumstances, can be ascertained. It is, llmvcvor, 5-;r==tif_vinp; to know, that whilst our endeavor still to improve them, implies some degree of imperfection, the present state of either of these cars is in advance of that which would be necossa. ry to insure the success of Rail.wa_vs. _ For the report of John Elgar, assistant of maclii. nery. soc paper marked G. annexed. In pursuance of the public call upon American genius, made by the directors. three locouiotive steam engines were produced upon the R:iil-road, one only of which has been made to answer any good purpose. This engine was built at York,Pcnu- sylvania, by Phineas Davis. and after undergoing certain modifications, was found capable ofcnnvey. ing 15 tons 15 miles perphour, on :1 level. It has been employed on that part of the Rail-way between Baltimore and E|licott’s Mills. and generally has performed the trip out to the Mills in an hour, with four cars, being a gross weight of about 14 tons.-—— . About 5 miles oftlic road ascends at an average rate of 17 feet per mile. The engine is mounted on wheels made for the common cars, of 30 inches diameter, and the velo- city is attained by means of gearing with a spur wheel and pinion upon one of the axles. The axles work in friction wheels, similar to those of tho VVL nuns car. The curvatures are traversed with facili- ty by this engine. Its greatest velocity for a short time, on the straight parts of the Road, has been at the rate of 30 miles per hour, whilst it has frequent. ly attained that of ‘.20 miles. and has often traveled in curvatures of 400 feet radius, at the rate of 15 miles per hour. The fuel used in the anthracite coal which has been found to answer the purpose well. The performances of this engine have, therefore, fully confirmed the opinion advancadiin the last an. noel report, that locomotive engines may be success. fully used on a Rail.wa_v having curves of 400 feet radius. This engine, however, weighing only 3 1.9. tons, in too light for advantageous use upon ascents. Taking into view the strength of the road where wood is usedin the construction, it is believed that it would not be advantageous to employ engines of greater weight than about 4 1-2 tons, and the engine now upon the Road affords a good index as to the requisite quantity of steam, and also of the proper. tione of the various parts, which should prevail in those that are to be constructed. As a further illustration of the machinery and fixtures herein referred to. and now used on the llal. timers and Ohio Bcil.road, and of the methods em. ploycd in constructing the Rai1.way,I have annexed the following drawings, executed by H. H. Latrobe, to wit : lat. A drawing of the friction wheel of the Wi. nuns car, showing Avertical section of the friction wheel and box. Alateral view of the same. i ' 131111! 9f the lower and upper divisions oftha box. 9d. Drawing of E‘lgar’s improved turn..out-'~com- prising a general view’ of it, and representations .0!‘ its several details. ‘ _. . . 3d. Drawings of the chilled castnron car wheel-— exhibiting dil’ferent parts by app1‘0pI'l8-$0 VIGWB 8-011 "sections. ‘ 4th. Drawings of the cm‘ tion of flour, showing——a.n 9 plan of the car—--together wit ing the barrels. . 5th. Representations of ti struetingthe Railway Om? _ tionaof the Baltimore and Ohio the details of a construction 0t‘ atone sills. Of wooden string pieces and Of wooden string pieces and stone blocks. t""‘°i "°”"‘.i°i~"° ‘.’i°.'f°"“§‘i.i27 ‘..'?.‘Z.°§.‘?“$.‘i.‘"i.i‘."'3.‘.ia° s or e ro ii 9 . ' mom“, an P H, will consist of the used for thetransporta. nd view, side view, and h the manner of stow- is various modes of 0011- loyed on different sec. Railmoad displaying sleepers. main line to the Point of Rocks, and on the lateral road to Frederick. The completion of the two tracks of Rail-way to this Potomac at the Point of Rocks, and of theein. gle track to the city of Frederick, together with the necessary depots. ~'I‘ho requisite stationary machinery to be placed upon the inclined planes at Parr’s ridge. The continuation of the Railway within the iin. proved parts of the city. The construction of cars and locomotive steam engines, to be carried on as fast as practicable ‘and expedient. four years the canal rev - ' extinguish its debt. tll8yl:ll:Jlll1(l}(l“f1(:)ll1ll(litii');’ liszildfiiclmll to on this question, as it is certainly clear thataelirlineillid m‘I‘::‘3t’“ 1 ”_151_0Y|: us far as Utica, would require that 0 put it into complete operation I am aware th . - . ' ' ‘etc are some who think the road may be comm-u¢_ ted in less time, but I have no hesitation in red‘ t- lug tl-mt it will require for its entire completign frltfm "'ghf- W “"1 Ll'_93}'3; and the Eastern Division will :‘(:ql;1ll6l0llg0l‘ time in proportion, inasmuch as near- .3 t] e whole of the first year will necessarily be lost II) t ie business of organization, leaving only time for Tho location of the route of the lateral Rail-way to VVashington, which it is expected will be com-‘i tion may be commenced within the year. mate can, however, be made of the probable cost of en finished. lations shall have be Respectfu mittcd. [FOR THE RAu..ao.m J(J[HtNAL.] server, which appeared in the seventh number of your Journal has attracted my attention, and appears to be entitled to an attentive consideration by every] citizen of New York. The construction of the Eriel ,C»anal gave the city of New York such adeeided ad. vantage over her commercial neighbors, as to call ."rom them the most vigorous efforts to arrest the de. clining progress of their trade. New York having‘, accomplished .1 great work, at a time when therel was no example to stimulate her energies, when iri-l telligent and prudent men among her own citizens condenfned the project as cliimerieal, and prophesied that the effort would prove abortive, or load the state with an interminable debt, appeared to be satisfied I'm-Ha time to rest from her labors. it was probably wise so to do, and give opportunity to test the prac. tical value of the work. Such however, was the well known result, as very shortly to produce in her commercial neighbors a determination to take some measures to counteract its influence; while in the enjoyment of_ the rich harvest ofhcr cute»-prize. she has appeared unconscious of their ability to affect plated at an early day,so that the work of c1pInstruc.qmical construction of the work But o esti.’ ' constructing this work, until the surveys and ealeu.)and further, the gre lly sub- will limit its J. KNIGHT, Chief paild—AtaI"in'd~ucd?‘iii’tli;ti.ilii:ii:s?lg:ti%"gTi'”5” would i I all h b'l't, ' lllr. Erlitor.——An article over the signature of Ob-lpan y, I pm a I I ypmve disastrous pl".’lll“l““’l' 9l“'V°J’é}- Should a company undertake We "“"‘~‘.‘* to . wi a the energy consistent with an econo_ lf'°‘=°ll‘3°t0