. American engineer and railroad journal . perpendicular working witli its maximum steam pressure, Mr. Adamssengine therefore would exert a tractive force equal to 30 jiercent, of the adhesive weight at this point in each revolution,and Mr. Buchanans would exert 24 per cent. If the wheelsbegin to slip at this or any other point in Iheir revolution, theyare liable to continue to do so during the rest of it, even if thetractive force or rotative elfect is less during the remainderthan it was at the point where the slipping commenced. The inference may, tlierefore, be drawn from these fa
. American engineer and railroad journal . perpendicular working witli its maximum steam pressure, Mr. Adamssengine therefore would exert a tractive force equal to 30 jiercent, of the adhesive weight at this point in each revolution,and Mr. Buchanans would exert 24 per cent. If the wheelsbegin to slip at this or any other point in Iheir revolution, theyare liable to continue to do so during the rest of it, even if thetractive force or rotative elfect is less during the remainderthan it was at the point where the slipping commenced. The inference may, tlierefore, be drawn from these facts audinferences that Mr. Adamss engine would be slippery whenworking up to its maximum capacity unices the rails were dryand sanded, or in tlie best condition to give a high co-efficient of adbesiciu. On tlie otlier liand, IMr. Buchanans en-gine would seem to lie sliglilly deficient in cylinder eainicitywluMi the rails are in nonil conditicm, and still more so if theyare dry and sanded. We are inclined to believe that both of. CYLINDKH OF ENGLISH tXPKESS PAbSENGEK LOCOMOTIVK, Vol. LXVII, No. 5.] AND RAILROAD JOURNAL. 221
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