460 AMEmeAn . RAILROAD JOURNAL. RAILROAD CAR MANUFACTORY TRACY 62. FALES, GROVE VVORKS, HARTFORD, CONN. Passage, Freight and all descriptions of RAILROAD CARS, As WELL AS LOCOMOTIVE TENDERS, . Made to order promptly. The above is the Largest Car Factoryin the Union. In quality of Material, and in Workmanship, Beauty and Good Taste, as well as Stren tli and Durability, we are determined our work shall e unsumassed. JOI-I N R. TRACY. TI-IOS. J. VA LES. CI-IILLED ’1‘lRES FOR LOCOMOTIVE ENGINES. To Railroatl Conlpanies. THE Undersigned, Assignee of Letters Patent, re- spectfully invites the attention of Railroad Com- panies to the CHI LLED TIRES for LOCOMOTIVE ENGINES, which he offers for sale. These Tires were first introduced by Messrs. Per- kins & Me Mahon, upon the Baltimore and Ohio‘ Rail- road, in 1843. where, after a long and severe trial, they were generally adopted, on both passenger and freight engines, and now have entirely superseded Wrought Tires on that road, on which are many engines of the heaviest class, which ascend grades of e£gIi.ty-five feet per m1'le, taking with them one hundred and twelve tons, exclusive of cars. This performance shows in some measure the ad}'i.csi'vc character and strength of the Tire. During a service of seven years, these Tires have very much exceeded in durability those of wrought iron, while their first cost, and expense of repairs, is more tlianjifty per cent. less. They also retain more equally their cliameter and proper form Qft7‘ed(l, which is a point of much value in engines with couplecl wheels. It is believed these Tires are peculiarly well adapted to freight engines, as the objection to coupling the wheels of locomotives is the encreaseclfrict-ion, arising [Xrincipally from the unequal wear of wrought tires; and hence most of the freight engines where wrought tires are used, have but four wheels as dw-iizers, with frequently a weight of si.t'teen tens, or more, upon them. which may be of no disadvantageto the engine, although its effect upon the ti-rick is like a car with st’.-t-tee~t ton.s- uponjbitr wheels, and it is presumed no one would permit cars so heavily loaded to pass over their read. As Chilled Tires wear more uniformly than those of wrought iron, there can be no doubt when these are used, that the weight necessary jbr adhesion may be distributed upon more driving wheels, without any material disadvantage to the engine, and thus placing less weight upon a single point, wouldrelieve the track, and secure, to a great extent, the object sought to_be gained by the plan so frequently proposed, of using light engines, which would bring with it the necessity of increasing the number of trains and_train hands. The complete success of Chilled Tires upon the Baltimore and Ohio road for the last seven years, and upon other roads for a more subsequent period, is a strong proof of their pi-act-{cal chm-aster, while their chea-pness and clumbi'lit'_i/, it is believed, recommend their trial by every railroad company. _ It may be thought by some that the iv/‘i'ole wheellor etrengtli, would be preferable to wheels with tires, but experience shows the latter to be a niuch_st-rimgeir and more elm-able wheel, on account of its freedom from tension, which is never the case with a whole wheel. That TENSION has much to do with the breaking of wheels and tires, may be inferred from the fact, that a set of chilled tires, five feet diameter, on a first class _ passenger engine, have been in constant service dur- ing the past winter, on one of our Eastern roads, and -have withstood the severities of the season, where whole wheels and wrought tireshave broken_.— And it may be proper to rerrrark, that wherever chilled tires have been introduced, whole wlieels as drivers are in- variably abandoned, tliey beiri far more expensive to maintain, as thereis a cran to form as often as a wheel is renewed, which is not the case on the renew- al of a tire _ _ The peculiar manner of fastemng these tires to the wheel without shrink, applies equally well to wrought tires, and is of much importance where they are used, as it secures them against the TENSION or STRAIN they receive by the present plan of 5-lirinlt-in.g them to the wheels, which undoubtedly is the cause of wrought mes breaking so frequently, particularly in cold wea- ther, which produces a greater contraction of the tire, thereby increasing the strain. This plan makes the tire perfectly secure upon the Wheel, and is attended with less c.t'p‘en.s'e, as will be seen by the following tes- timoniaii‘, which are respectfully submitted. Lowell, March. l.El5l. L. B. TYNG. TESTIMONIALS. Baltimore and Ohio R. R. Ofiicc, é Jan 2, 1850. Mr. L. B. TYNG, Lowell, lVlass.——-Sir: Your favor of the 26th ult ,is before me, asking my opinion of the Chilled Cast Iron Tires, of Messrs. I’erl