PLATE A. 



Examples of early Photomicrographs from Sorby's Paper to the 



IroD aud Steel Institute, 1887, '• On the Microscopical Structure 



of Iron and Steel." 



Figure i. 



Photomicrog-raph by Sorby. 

 Magnification q. 



FlGUUE 2. 



Photomicrograph by Sorby 



Magnification q. 



Blister Steel, Longitudinal Section. 



