. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . -f|-iH4H:fr+Hy-^Ui|f!m Cars •v.*«>*^!!Lt9^^Si^^^^£3^!§!S§«5«§^?555?^§!g5§§SJ!R!SS§§5§§§§^StSS!f n^OjV *^-; 0 0,<o <0 Vi% § ■<» <0 N. »!?i^ N N io VV) ^ H) 5^ > ^UIAGRAM SHOWING RESULTS OF CYLINDER LEAKAGE TEST ON THE 100 CARS TAKEN AT ONE OFTHE TERMINALS.—TABLE NO. 4. SO lbs. per minute between two consecu-tive cars and back to 3/2 lbs. again twocars later, would not be conducive to safegrade braking. A second diagram shows the leakage on 174 cars having a leakage of 5 lbs.
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . -f|-iH4H:fr+Hy-^Ui|f!m Cars •v.*«>*^!!Lt9^^Si^^^^£3^!§!S§«5«§^?555?^§!g5§§SJ!R!SS§§5§§§§^StSS!f n^OjV *^-; 0 0,<o <0 Vi% § ■<» <0 N. »!?i^ N N io VV) ^ H) 5^ > ^UIAGRAM SHOWING RESULTS OF CYLINDER LEAKAGE TEST ON THE 100 CARS TAKEN AT ONE OFTHE TERMINALS.—TABLE NO. 4. SO lbs. per minute between two consecu-tive cars and back to 3/2 lbs. again twocars later, would not be conducive to safegrade braking. A second diagram shows the leakage on 174 cars having a leakage of 5 lbs. perminute or less. The average leakige ofthese 174 cars was lbs. as given in thediagram. Likewise the group of cars inthe leakages summary from to 10 lbs. less, and that only per ceni of thecars had a piston travel falling withinthe range of from 754 >• to ^ in. The scope of the investigation wasso great that it undoubtedly represents the March, 1922 RAILWAY AND LOCOMOTIVE ENGINEERING n. DIAGRAM SHOWINll INITIAL PRESSllRKS RESULTING FROM AT 10 LB. BRAKE PIPE RKDIC IK )N AND IKKSSURE REMAINING AT THE END OF ONE MINUTE. average comlitii)ii of the air hrako ciiiiiii-ment throughout the country, and it showsfurther that that equipment is in a deplor- able state of much needed repairs. arises as to what can be done to im-The condition must, therefore, be ac- prove it by those who are qualified toceptcd as a proven fact and the question make improvements. Comparative Tests of Steel at HighTemperatures At the last meeting of the AmericanSociety for Testing Materials, Mr. R. presented a paper on someComparative Tests of Steels at High Tem-perature that were made in the laboratoryof the AllisjChalmers Co. at The temperatures to which tlie steelswere raised for testing ran up to about1300° Fahr, which was up to an approxi-mation to those obtained in internal com-bustion engines. The points of especialinterest, however
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