. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd 12 tons of coal. The , engine and tender lbs. It is a good example ofworkmanship and design of this type ofengine and it is part of th: Rogers ex-hibit at the Louisiana Purchase Expo- 6,080 ft. That is, just 800 ft, longer thanthe mile with which we railroad menare familiar. This nautical mile, oftencalled a naut, is the one-sixtieth part ofone degree measured along the earthssurface at the equator. The term knot,in this connection, is used to mean somany sea mil
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . nd 12 tons of coal. The , engine and tender lbs. It is a good example ofworkmanship and design of this type ofengine and it is part of th: Rogers ex-hibit at the Louisiana Purchase Expo- 6,080 ft. That is, just 800 ft, longer thanthe mile with which we railroad menare familiar. This nautical mile, oftencalled a naut, is the one-sixtieth part ofone degree measured along the earthssurface at the equator. The term knot,in this connection, is used to mean somany sea miles per hour. When a shipis called a i6-knot ship, it means thather speed is, or ought to be, 16 nauti-cal miles per hour. The per houridea is included in the term knot. Asea mile, or a geographical mile, or anautical mile, which are all the same,cant any of them be a knot. It is,therefore, incorrect to say that a ves-sel steamed so many knots per hour,because that is equivalent to sayingshe steamed so many sea miles perhour, per hour. This expression intro-duces the idea of acceleration. It therc-. Tlioma-s E. Adams. Gtrneral Master Mcctianit Rogers Locomotive Worlcs, Builders- ROGERS PASSENGER MOGUL FOR THE COTTON BELT. wheels are 61 ins. in diameter. The ad-hesive weight is lbs. and with200 lbs. steam pressure the calculatedtractive eflfort is about lbs. and theratio of tractive effort to adhesive weightis as I to 4,86. The driving wheels are equally spaced,which fact, although not important,gives the engine a very symmetrical ap-pearance. All the wheels are flanged andthe springs of the main and rear driversare underhung, and are equali;:ed to-gether. The pony truck and the leadingdrivers are equalized together. The framebracing is very substantial. The RogersWorks general practice is to bolt a heavyand broad flanged steel casting betweenthe frames, just back of the cylindersaddle. The boiler is of the extension wagontop semi-wide fire box kind intended forbit
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