216 DESCRIPTION OF PLATES 



PLATE XI 



FIGURE 34. Skin. Low power. From a case of Mexican typhus showing 

 the proliferative lesions "typhus nodules" and a cross section of an 

 artery with a thrombus. 



PLATE XII 



FIGURE 35. Skin excision, eleventh day. A capillary of the skin with 

 hemorrhage. There is a mural thrombus and discontinuity of the 

 endothelium. 550 diameters. 



FIGURE 36. Skin. Autopsy 37, death on tenth day. A small artery of the 

 subcutaneous fat is shown with thrombosis and perivascular infiltration. 



PLATE XIII 



FIGURE 37. Artery of skin. Autopsy 32, death on fourteenth day. Figures 

 84, 85, and 86, plates XXXII and XXXIII show individual endothelial 

 cells from this thrombus at high power. Approximately 600 diameters. 



FIGURE 38. Artery of testis. Autopsy 32, death on fourteenth day. A 

 mural thrombus with necrosis of the vessel wall and perivascular reac- 

 tion. Approximately 600 diameters. 



PLATE XIV 



FIGURE 39. Arteriole of skin, excised on seventh day of typhus. There 

 is shown an early mural thrombus covered with endothelium, and 

 an early proliferative perivascular lesion or "typhus nodule." 800 

 diameters. 



PLATE XV 



FIGURE 40. Arteriole of skin. Autopsy 15, death in second week, probably 

 early. Shows attached mural thrombi composed almost wholly of 

 phagocytic endothelial cells. There is an early proliferative perivascu- 

 lar reaction. 400 diameters. 



PLATE XVI 



FIGURE 41. Myocardium. Autopsy 11, death on seventh day. To show 



diffuse and focal lesions. Approximately 125 diameters. (Compare 



with drawing, Plate XVII, figure 43.) 

 FIGURE 42. Skeletal muscle. Autopsy 37, death on tenth day. Shows 



diffuse infiltration, one typhus "nodule," and perivascular infiltration. 



Approximately 125 diameters. 



