. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . cond; while western hemlock, loblollypine, tamarack, and Norway pine followin the order given. Douglas fir and west-ern hemlock, of which there are com-paratively large supplies, have high struc-tural merit, as has also loblolly of the information hitherto avail-able concerning the strength of timberhas been secured from tests of smallpieces without defects. This can not safe-ly be assumed to hold good for large-sized timbers as found on the market,since these commonly contain such
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . cond; while western hemlock, loblollypine, tamarack, and Norway pine followin the order given. Douglas fir and west-ern hemlock, of which there are com-paratively large supplies, have high struc-tural merit, as has also loblolly of the information hitherto avail-able concerning the strength of timberhas been secured from tests of smallpieces without defects. This can not safe-ly be assumed to hold good for large-sized timbers as found on the market,since these commonly contain such defectsas checks, knots, cross grain, etc. Theproportion of heart and sap wood, andthe state of seasoning, must also be con-sidered. Circular 115 of the Forest Ser-vice, just issued, gives the results of teststhat have been conducted during the pastfour years at timber-testing laboratoriesin different parts of the country. Thiscircular will be mailed upon applicationto The Forester, Forest Service, Wash-ington, D. C. One Year andEleven Months SERVICE WITHOUT REPACKING, ON High-Pressure Locomotives. Style 30O TV. A throttle failure is an absolute impossibility where Crandalls Throttle Valve packing is used. IT WILL NOT BLOW OUT Crandall Packing Co. FACTORY AND GENERAL OFFICEPALMYRA, - - NEW YORK BRANCHES Circular No. 2 has been issued by thePittsburg Pneumatic Company illustrat-ing their drills, yoke riveters, chippinghammers and special devices. The fine ■implements manufactured by this com-pany have taken their place at once inthe front rank of mechanical tools. Sev-eral improvements have been developed,especially the long stroke riveting ham-mer, which has increased the force of thehammer blows while reducing the vibra-tion to a minimum by the adoption of anlni*air cushion. It may be noted that theair hammer as manufactured by the com-pany has the peculiarity of taking airduring the first quarter of the strokeonly, the air being used expansively justas steam is used in the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
