Smithsonian Rer^ort, 1901. — Glazebrook. 



Plate II, 



J'* 



vfl/?? Si'ifi'i?' 





Fig. 1.— Section of Iron after various Treatments. 



Fig. 2.— Section of bad Rail. 





Fig. 3.— Section of good Fig. 4.— Section of bad Fig. 5.— Section of Rail 

 Rail. Rail, showing Sur- after rolling, 



face to which Frac- 

 ture WAS due. 



