sider them the best spring now in ‘AMERICAN uarnnoan jounnat. 496 Great American Engineering ND MECHANICAL WORK, _]11Sl’. published in medium folio, 75 cts. to Subscribers, One Dollar to non-s"bscrihers. _ _ Part VI of “ Specimens ofthe Stone, Iron and Tim- ber Bridges, Viaducts, Tunnels, &c. &c. of the United States Railroads." By George Duggan, Architect and Civil Engineer. The present part contains beautifully executed plans, elevations and sections of the Timber Bridge (three spans of 150, and one span of 160 feet) across the Del- aware at Saw Mill Rift, on the line of the N. York & Eric R. R., with the specifications, estimates, bills of timber, iron, etc. N.B.--With the present (6th) part, are given speci- men Plates of the APPENDIX, (or “ THEORETICAL AND PRACTICAL TREATISE ON BRIDGE BUILDING, etc. etc.”) consisting of plans, elevations, sections and de- tails of a cast iron oblique arch, 130 feet span, across Fairfield st. Manchester, on the line of the Manches- ter and Birmingham Railroad. Also a specimen sheet‘ of the letter press of the APPENDIX, consisting of an introductory article on the Application of Iron to Railroad Structures. “It is a work that was a great desideratum, and must prove of great benefit to the engineering profes- sion generally, and especially to the tyre in practical engineering and mechanical knowledge; in truth it strikes us, that it would require years of labor and pa- tient toil on the part of a young engineer to prepare the drawin s, and collect the information that will be em- bodied in this work, and can now be secured for the trifling sum of $9”—[S cientific Amer. March 16, 1850. In connection with this subject (Iron Railroad Struc- tures) we talce occasion to call attention again to Mr. Duggan’s valuable and expensive publication, exhibit- ing drawings,with full descriptions of the various stone, iron and wooden bridges, viaducts, tunnels, culverts, etc., of all the Railroads in the United States. Mr. Duggan is an accomplished Architect and Civil En- gineer, who came from Ireland to tl‘ is country to ex- ercise his profession; but finding .tailroad construc- tion here, in many respects, different from that he had been accustomed to inEurope, he applied himself to the study of our system ; and the fruits of his re- searches and investigations embodied in this work, are well calculated to meet the exigencies of engineers, and to assist drau htsinen, bridge builders, mechanics and students.——-[ . Y., Journalof Co1nmerce,_Feb. 14, 0. Published by GEORGE DUGG-AN, . 300 Broadway, New York. To whom all communications should be addressed, and subscriptions forwarded. ' FOWLER NI. RAY’S Patent India-ruibber Railroad C A R. S P R I N G . New York and Eric Railroad Shops. Piermont, March 26, 1850. This will certi"y that from practical ex nerience in the use of Fowler M. Ray’s India rubber ar Springs, I believe them to be far superior to any others now in use. I have never known them to be affected by any change of temperature, as other Rubber Springs have been affected on this road. _ _ I am at the present time repairing a Passenger Car that Mr. Ray and myself mounted with his springs about two years and eight months since. The springs are at the present time as perfect, to all appearances, as when first applied to the car. ‘ Respectfully yours, HORACE’ B. GARDNER, Foreman of the Car‘Shops. Supt. Oflice N.Y. dz. H. R.R , g New York, March 8, 1850. This is to certify that we have used the Rubber Springs manufactured by Mr. F. M. Ray for the past twenty months, “ both for Passenger and Freight Car » Springs and Bumpers, and of different sizes,” and have in every case given entire satis_fac,tion, and I con- use. M. SLOAT, Supt. 7 Boston, March 5, 1850. In answer to your enquiry about India-rubber Springs, 1 have to say that we have used them to a considerable extent on both freight and passenger cars, and also on several of our tenders; and I am very well satisfied thatthey answer all the purposes for which they are intended.l I believe fthe India-r(1i1bber will soon supersede all ot ier springs or cars an ten- ders, Yours truly, M. FELTON, Office New Jersey Railroad Co., Jersey City, March 8, 1850. FowLnu M. RAY Esq., Dear Sir: In ahswer to your enquiries respecting tllie opiergtion of the Vulcapised Rubber Sprtings, pur- c iase y our company rom you some wo_ years since(. I reply that they are surulniordto any sprlng in use that I have either seen or tear of). The improved form of your spring, consisting of a solid piece of vulcanised rubber with bands on_ the out- side, is far superior to your first form, consisting of disks of rubber with metallic plates interposed. The last named form was tried, ifyou recollect, at a much earlier period; and then was replaced by your last form. _ _ I have no hesitation in saying that your springs have givein lcntire satilsfacélon, and i_nos'thcl1ee11'1full'y comnien tiem to nu ma, companies rourr on e country for the following reasons : D 1st. The cost is 30 per cent. less. 2d. Saving of weight on each car of 8 wheels from 700 to 800 lbs. 3d. Less care and attention is required, as they are not liable to get out of repair. 4th. A great saving is secured in the wear and tear of5tl11le C’]Z:‘1i's and (iiails firom then“ great elasticity. t . 1e ree om . rom noise. 6th. There is grelitter safety in case of accident, as they cannot be bro on. 7th. The comfort of passengers is enhanced sufli- ciently to pay the expense, waiving all the other rea- ‘ sons that I have given. Should this fail to satisfy any person enquiring, you are at liberty to refer to me, N 0. 150‘Washington St., Jersey City. Yours respectfully, T. L. SMITH, Supt. New York, March 11, 1850. I have used the Patent India-rubber Spring pur- chased of Mr. Ray, upon the cars of the New York and New Haven Railroad, and have found them effl- vicnt and economical ; and when applied to the axles and draw springs, believe them to be quite equal to any in use. I have found a combination of these springs with a steel spring under the transom beam _a very satisfactory arrangement, and am now using this plan in all new cars. Yours respectfully, ROBERT SCI-IUYLER, , . _ February 25, 1850. From practical observation of the use of the I ndia- rubber Car Springs,” manufactured and sold by your company, we are entirely satisfied in their application, and do not hesitate to recommend them as elastic, du- rable, requiring no repairs for years, and retaining their consistency durin all extremes of weather. We have applied them for tie past two years, and CO1'1Sld- er them‘ superior for all railroad purposes. Yours tru y, OSGOOD BRADLEY, Car Builder, Worcester. T. & C. WASON d Springfield. 1 O. DEAN, PACKARD do MILLS do. _ do. DAVENPORT & surpass, do. Cambridgeport. Oflice of the New Jersey Railroad 00., J erscy City, March 7, 1850. This is to certify that we have had Mr. F. M. Ray’s India-rubber Springs in constant use under our cars and as Bumper Springs for upwards of two years, an they have in every way given perfect satisfaction. The present form of spring we deem far superior to the form of Disk, having used both forms, although we have none of those made in Disks at presentin use. We take pleasure in recommending these springs to all railroad companies. J. P. JACKSON, Vice Prest. New Jersey Railroad and Trans. Co. Ro;bury, February 28, 1850. In compliance with your request, I take great plea- —2r ' Fall'River, February 2, 1850. _In answer to yours of the 20th ult. I would say that this company has for some 10 or 12 months past been using “Rays Inclia~rubber Springs.” We have an- pli-d them to both passenger and fro-1' ht cars with uniform success. They have invaria ly preserved their elasticity and consistency through all the ex- tremes of weather; and we are now applying them whenever the steel spring fails. I am well satisfied that they are particularly adapted for railroad purposes. Very respectfully yours, GEO. HAVEN, Supt. Fall River Railroad. Jersey City, March 9, 1850. This is to certify that the present form of Mr. F." M. Ray’s India—rubber Car Spring I consider far su- perior to the form of Disk, having used both forms. I take pleasure in recommending these springs toil railroad companies. DAVID H. BAKER Foreman of Car Shop of N.J. l{.R. dz. Trans. Co_ Harlem R.R. Depot, . New York, March 7, 1850. This is to certify that we have used Mr. F. M. Rny’s India-rubber Springs for over eighteen months, and find them to be easy and durable, and recommend them to ra1Iroad'companies_as being superior to anything we have tried. J. M. SMART, Foreman at 42d St. Depot. 015‘ Colony Railroad Oflice, Boston, March 6, 1850. EDWARD CRANE, Eg -3 President N ewqfilngland Car Co., Dear Sir‘: In compliance with your request 1 would state that the Old Colony Railroad Comp’y have had in use upon tncir road, India—rubber Springs furnish- ed by your company, for more than eighteen months past, during which time they have been extensively used under Passenger and Freight Cars, Locomotive Tenders, and for Drawer and Buffiing Springs, with the most perfect success. The elasticity and consis- tency of the Rubber has never been unfavorably affect- ed by either extremcs of heat or cold———and from the experience which we have had in the use of Rubber Springs, I think them well adapted for railroad pur- poses——and therefore we have for some months ast used Rubber almost exclusively, in all places w ere springs are required. Respectfully yours, etc., JAS. H. MOORE, Supt. O. C. Road. Troy, February ‘27, 1850. We have been using your India-rubbcrCar Springs for nearly two years-—and we take plea.-'u1'e in saying that in our opinion the rubber has to a certain extent already, and may eventually entirely suspersede all other Snrin s for Railroad Car purposes. We now use itcntire y for Draw Springs and Bumpers, con- sidering it better and lighter than steel. During our two years’ experience in the use of i we have not known any to lose their elasticity, or fai in any way; and we cheerful! recommend the rub- ber for railroad car springs. cry res pt-ctflllly, , EATON, GILBERT do CO. P.assenge1' Car Luungs. I-IE Advertiser continues to make to order the Enamelled Car Linings which have been so high- ly approved the last three years, and are now exclu- sively used by all the Northern Railroads. No pains are spared to get out new styles, and adapt them to the tastes of every consumer. Orders addressed to CHARLES STODDER, No. 75 Kilby street, Boston, will have prompt attention. March 23, 1850. 2m. India-1‘11bbe1*fo1' Railroad Cos. sure in stating the result of my experience in the use of “Ray’s Patented Vulcanlsed India-rubber Car and Engine Spr'u.gs." We have used them nearly two years, and never had one fail in any way. The cold weat/tar does not affect them, as it has other rubber springs we have used. _ g _ With sixteen years’ experience as superintendent of machinery‘on the Boston and Providence railroad, I take pleasure in saying that your springs are the best we ever used, or I ever saw usedelsewhere. We have 20 cars rigged with them, of which I can say that the springs are as good now aswhen first ap plied. I put 24 lbs; of the rubber under the fore ard end of one of our heaviest engines, taking off 250 lbs. of steel springs —-it has been in use 18 months, and is in as good con- dition now as when first put under the engine. Very respectfully yours, " UBBER SPRINGS-—Bea.ring and I_3’ufl'c7‘-—FuI- lcr’s Patent—-Hose from 1 to l_‘.’ inches diameter. Suction Hose. Steam Pac/tinrr-—Iroru 1-16 to ‘lin. thick. Rubber and Gulta Per-gin 1)’a.nds. These ar- ticles are all warranted to give satisfaction, made un- der.Tyer & Helm’s patent, issued _January, 1849.—— No lead used in the composition. Will stand much higher heat than that called “Gocdyear’s,” and is in all respects better than anyin use. Proprietors.ofrail- roads do not be overcharged by pretenders. . ;_-,1 ~ I-I0i»’.ACE H. DAY, , Warehouse ‘.23 Courtlandt street. New York, May 21, 1849. Spikes, Spikes, Spikes. A-NY person wishing a simple and effective Spike Machine,or_a number of them, mafy be supplied GEO. s. GRIGGS, Supt. Fitchburg Railroad. A M Supt. of Machinery, Boston and Prov. R.R. by addressing , March_6, 1850. Troy, N. Y.