. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . we had assumed for the moment thatsound was musical. The broad distinc-tion between musical sound and noise isthat musical tone is produced by a seriesof regular, periodic vibrations and thatnoise is the result of more or less ir-regular shocks. The production of amusical note is secured when the im-pulses which travel through the air suc-ceed each other regularly in the samedefinite interval of time. The origin cfthe periodic air waves has nothing to dowith the fact that the sound is musical
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . we had assumed for the moment thatsound was musical. The broad distinc-tion between musical sound and noise isthat musical tone is produced by a seriesof regular, periodic vibrations and thatnoise is the result of more or less ir-regular shocks. The production of amusical note is secured when the im-pulses which travel through the air suc-ceed each other regularly in the samedefinite interval of time. The origin cfthe periodic air waves has nothing to dowith the fact that the sound is musical,the middle C of the piano is a musicalnote produced by 256 vibrations in eachsecond, and this fundamental tone will besounded, whether the requisite numberof vibrations be produced by the sweep ofa bow across the strings of a violin or bythe blade of a knife drawn quickly overthe teeth of a saw. The octave of thisnote is produced by the continuous repe-tition of twice as many, or 512vibrations in a second, and like One Year andEleven Months SERVICE. WITHODT REPACKING. ON High-Pressure Locomotives. I 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. FACrrORT AND GENERAL OFFICE PALMYRA, - - NEW YORK BRANCHESNew York Cleveland ISO Ubertj St. 9 So. Water St. Chicago 52 West Washington St. Directory of Railwaysof the World The Universal Directory of Rail-way Officials, published im Lon-don, contains a list of the •ntlrerailroads of the world, withphysical particulars and oameiof all officials. Send Your Order Now for the 1906 edition. Price $ Prepaid A. FENTON MTALKER Sole RepreHentatUe for D. Liberty St. New YerK Juiif, Kjtty. RAFLVVAY AND LOCOMOTIVI: ENGINEERING 295 LocomotiveBlow=Off Plug Valves
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
