PLATE 32. 



Pathological Sections. 



SECTIONS OF PORTIONS OF THE SAME CANCER AFTER TREATMENT WITH 

 RADIUM. (Compare Plate 31.) 



The photographic data are exactly the same as those given for 

 A and B, Plate 31. 



The effect of the Radium treatment may be gathered from the 

 changed appearance of the sections. Masses of fibrous tissue are 

 visible, together with blood vessels with very much thickened walls, 

 and a few patches of necrotic growth. 



The four photomicrographs, cancer sections, are selected as an 

 example of the use of photomicrography in pathology. The best 

 general view of the section is obtained by using a f " objective with a 

 medium eye-piece giving a magnification of 100 times, but the 

 structure of the cells cannot be readily made out unless an 

 amplification of 500 to 700 times is employed. For this purpose a %" 

 of low N.A. with a high eye-piece or, better, a long camera extension 

 is most suitable. 



Photos. H. L. H. from sections kindly 



supplied by Dr. N. S. Finzi. \TofollowPlate31andpage224. 



