of Steel under Mechanical Stress. 



207 



Thus, taken in conjunction with Osmond's experiments, 

 those quoted above would seem to show that the increase in 

 the value of the limit of elastic resistance with permanent 

 strain is due to a permanent straining of the individual mole- 

 cules. 



Experiment I. — Steel Bar. 







DQ 









to 









<~ £ 







Jh 



«« a 







£ 



s ° .2 



<n r 





.2 



s ° .2 



c* - 



rQ 



<D 



"■* 73 '-5 



s 



i ■ 



© 



■■-« CO '-+3 



s$ 





e3 



B 



© ^ » 



1 ° 



i 



2 



<X> 13 p 



1 



o 



O 



o 



.8 §•§ 



fel 



o 



Hi 



2 



Tim 

 econ 

 vib] 



i 



CM 



i — i 





1-417 









3 







00 



24-9 



218 



o-o 



1-418 



18-9 



389 



01 



1-417 



24-85 



219 



5-4 



1-457 



18-7 



398 



02 



1-417 



250 



217 



00 



1-418 



18-7 



398 



0-4 



1-418 



24-8 



221 



00 



1-418 



18-65 



400 f 



00 



1-417 



24-85 



219 



5-6 



1-458 



18-65 



400 



06 



1-420 



24-75 



221 



o-o 



1-418 



18-6 



403 



0-8 



1-420 



24-6 



224 



5-8 



1-463 



18-7 



398 



1-0 



1-422 



24-55 



225 



00 



1-420 



18-5 



407 



00 



1-417 



24-9 



219 



60 



1-465 



18-3 



416 



1-2 



1-424 



24-1 



234 



o-o 



1-420 



18-5 



407 



14 



1-425 



23-7 



243 



6-2 



1-465 



18-35 



414 



16 



1-426 



23-35 



250 



0-0 



1-420 



18-4 



412 



1-8 



1-427 



22-4 



273 



6-4 



1-467 



18-2 



421 



2-0 



1-428 



21-8 



289 



00 



1-421 



18-55 



405 



o-o 



1-417 



22-6 



268 



6-6 



1-469 



18-3 



416 



0-0 



1-417 



22-5 



271* 



00 



1-421 



18-3 



416 



22 



1-430 



20-9 



316 



6-8 



1-470 



18-0 



431 



24 



1-431 



20-55 



327 



0-0 



1-421 



18-6 



403 



2-6 



1-433 



20-4 



332 



70 § 









2-8 



1-434 



20-3 



336 



00 



1-455 



18-8 



394 



3-0 



1-436 



19-85 



352 



7-0 § 









o-o 



1-417 



20-7 



322 



0-0 



1-507 



19-2 



377 



00 



1-417 



20-75 



321* 



70 § 









3'2 



1-437 



196 



361 



00 



1-538 



19-4 



369 



3-4 



1-438 



19-5 



365 



o-o 



1-538 



19-5 



365 } 



36 



1-439 



19-65 



359 



7-7 



2-095 



17-95 



433 



3-8 



1-440 



19-6 



361 



00 



2-036 



25-35 



210 



4-0 



1-442 



19 45 



367 



8-0 



2178 



16-5 



515 



00 



1-417 



20-05 



344 



o-o 



2-112 



25-05 



216 



00 



1-417 



19-9 



350* 



8-3 



2-323 



16-8 



497 



4-2 



1-444 



191 



381 



00 



2-248 



25-45 



209 



00 



1-417 



19-75 



355 



8-6 



2-455 



16-65 



506 



4-4 



1-446 



19-15 



379 



o-o 



2-374 



25-7 



204 



00 



1-417 



19-45 



367 



90 



2-692 



1705 



482 



4 6 



1-451 



191 



381 



00 



2-616 



26-4 



193 



00 



1-418 



19-5 



365 



9-3 



2-981 



16-8 



497 



4-8 



1-452 



18-8 



394 



00 



2-893 



26-35 



194 



00 



1-418 



189 



389 



100 





17-4 



462 



o-o 



1-418 



189 



389 f 



o-o 





275 



177 



50 



1-453 



18-85 



391 



10-5 





17-35 



465 



0-0 



1-418 



19 05 



383 



o-o 





28-0 



170 



52 



1-455 



18-65 



400 



10-87 







18-1 



426 || 



* After 10". 



t After 5". 



t After 17 hours. 



Load removed after small permanent set. 

 After fracture. 



