XXVI LIST OF ILLUSTRATIONS 



11. Section ol ^kiii iiiulcr low and liii^li p()vver magnification 



showing fully developed phenomenon three and one-halt 

 houis after intravenous injection of reacting factors iGS 



12. A, Settic:)n of skin site after prej^aration with B. lypJiosus 



filtrate almost completely neutralized by homologous anti- 

 toxic horse serum, followed by intravenous injection of 

 same filtrate. B, Section of skin site after preparation with 

 non-neutralized B. iyphosiis filtrate followed by intravenous 

 injection of same filtrate 1 70 



13. A, Section of skin site after intradermal injection of typhoid 



bacillus filtrate. B, Histologic appearance of typical phe- 

 nomenon after skin preparation with typhoid bacillus 

 filtrate followed by intravenous injection of same filtrate 171 



14. Low and high power views of large hepatic vein with many 



parietal thrombi, high power view showing structure of 

 thrombus 201 



15. Photomicrographs of parietal venous thrombi in lung and 



spleen, and filling siurounding splenic sinuses 203 



16. Gross appearance of kidneys, showing focal and diffuse corti- 



cal necrosis 206 



17. Area of focal tiiliular necrosis, with capillary thrombosis of 



adjacent glomeruli and hemorrhagic necrosis of renal 

 cortex 208 



18. Sarcoma 180 in control series of mice 226 



19. Histologic appearance of normal twelve day old sarcoma 180 227 



20. Ttimor reactions in mice bearing twelve day old sarcoma 180 



which had received B. lypJiosus "agar washings" filtrate 

 intravenously 229 



21. Histologic appearance of sarcoma 180 in mouse which received 



B. typhosus "agar washings" filtrate intravenously, four 

 and twenty-four hours after injection 231 



22. Histologic appearance of sarcoma 180 in mouse which received 



B. typJiosiis "agar washings" filtrate intravenously, forty- 

 eight hours and eight clays after injection 232 



23. Sections of same tumor nineteen days after injection 233 



24. Section of twelve day old tiny necrotic sarcoma 180 in mouse 



with spontaneous infection of B. enteritidis 245 



25. Histologic appearance of twelve day old sarcoma 180 twenty- 



iouv hours after intravenous injection of live culture of 

 rough B. enteritidis 247 



