396 CHAIN BRIDGE, 



To see what defect in strength a wire would 

 exhibit when broke several times successively, 

 I took a piece of the same thickness as that 

 above, and suspending it in the same manner 

 as before, broke it six times by weights hung 

 at the bottom, and increased about 41bs. each 

 time ; the results are as below : — 



The wire, exclusive of the fastenings, was 

 8 feet long when the experiments began, and 

 3 feet 3 inches when they ended. 



With another wu*e of the same thickness, 

 broke six times successively, the results were 

 as below: — 



Experiments. Breaking weights. 



1 218 



2 211 



3 207 



4 222 



5 215 



6 214 



