158 



W. H. WARREN AND S. H. BARRACLOUGH. 



Table II. 

 Determination of the elastic limit and coefficient of elasticity in 

 tension of nickel steel «T" (medium). 



Length upon which the elongations were measured = 150 mm. (6 in.) 

 Diameter = 0-609" Area = 0-2911 square inches. 



Loqd in- 

 1,000 fts. 



Iven,diiii2> in 5 ^- 00 -n)m 



Mean 

 Extension 



in 10^00 mm - 



Differences per 

 1,000 lbs. 



Top. 



Bottom. 







000 



7'00 



7-00 



113 



1 



0-48 



7-65 



8-13 



1-87 



2 



1-30 



8-70 



1000 



1-91 



3 



2-18 



9-73 



11-91 



1-90 



4 



310 



10-70 



13-81 



1-92 



5 



4-03 



11-70 



15-73 



1-74 



6 



4-85 



12-62 



1747 



1-87 



7 



5-78 



13-56 



19-34 



1-88 



8 



6-80 



14-42 



21-22 



1-87 



9 



7 79 



1530 



2309 



1-89 



10 



8-78 



16-20 



24-98 



1-64 



11 



9-62 



17-00 



26-62 



1-88 



12 



10-60 



17-90 



28-50 



1-80 



13 



11-52 



18-78 



30-30 



1-90 



14 



12-50 



19-70 



32-20 



1-90 



15 



13-48 



20-62 



3410 



f Limit of 

 2-16 Elasticity 



16 



14-48 



21-78 



3626 



211 



17 



15-62 



22-75 



38-37 



2-19 



18 



16-66 



2390 



40-56 



2-46 



19 



1800 



2520 



43 02 



4-23 



20 



20-00 



2725 



47-25 





15 500 

 f Limit of Elasticity = 15,500 lbs. or ~^rz. = 53,200 lbs. per so. in. 



02911 (23-75 tons) 

 Coefficient of Elasticity = 27,120,000 lbs. per sq. in. 



= 12,110 tons per sq. in. 



