Degenerations and Infiltrations. 17 



Portion of a testicle in which a caseating syphilitic deposit 

 had formed — injected and in spirit. 



The yellow caseating substance is shown in strong relief 

 from the injected tissue round about it, and it may be noted 

 that the vascularity is greatest in the neighbourhood of the 

 caseation. . . G. C. 3154. 



1. 58. Calcareous Infiltration. — Portion of two large arteries 

 in which the middle coats have been infiltrated with lime salts 

 — cleaned and dried. 



The calcareous plates stand out from the surrounding parts, 

 and it may be seen in many places that the calcareous deposit 

 follows the direction of the circular fibres of the middle coat. 



G. C. 3155. 



1. 59. Pigmentary Infiltration.— Portion of lung from a case 

 of anthracosis. 



The excessive deposit of carbon in the lung has caused 

 many parts of it to be as black as soot. Pleurisy has been set up, 

 and the costal and pidmonary surfaces of the pleura are closely 

 matted together. G. C. 3153. 



1. 60. Pig-mentation from Chronic Congestion.— Portion 



of skin from the front of a tubercular knee, which had been 

 frequently blistered. 



The skin was removed in excision of the joint, and shows 

 a deep pigmentation, such as results from frequent congestions 

 from any cause. G. C. 3340. 



Presented by A. G. Milleu, F.R.C.S.E., 1892. 



For pigmentation in new growths, see Melanotic Sarcomata, series 9. 



For gangrene, see series 11. 



For forms of new growth, see affections of different textures and organs. 



