1879.] Long-continued Stress on the Elasticity of Metals. 223 



an end after about five months had been expended on it by the wire 

 becoming rusted through. A fresh wire was, however, suspended 

 some months ago, and was carefully varnished to prevent rusting. It 

 is now under experiment. 



Pounds. 



'Wire ISTo. L>, put up February 18, 1878, broke March 10 with 48 lbs., elongation 

 37 cent., or 8"132 per cent. 



