YELLOW FEVER. 431 



" Exp. No A. Injected yellow fever blood, one and 

 a half drachms, of first day, into femoral vein of dog 

 No. 3. Blood obtained by cupping from patient in civil 

 hospital and mixed with a small quantity of soda bicarb., 

 to prevent coagulation. Result, entirely negative. 



" Exp. No. 10. One-half of a blanket from a yellow- 

 fever patient's bed was placed in the cage with dog 

 No. 4, and left there for several days. No result. 



" Exp. No. 11. Dog No. 5 was allowed no water 

 for two days, except a supply in which the other half 

 of this blanket (Exp. No. 10) had been washed. No 

 result." 



Other experiments were made, in which the 

 blood of yellow fever patients, obtained post mortem, 

 was injected into rabbits and guinea-pigs with 

 fatal results. But no importance was attached to 

 these experiments, as several hours had in every 

 case elapsed after the death of the patient before a 

 post mortem examination was obtained and the blood 

 collected. It is well known that putrid blood kills 

 rabbits, and also that the blood of scarlet fever 

 and other diseases, obtained post mortem, produces 

 death when injected beneath the skin of these 

 animals. Similar results follow the injection of 

 other material containing the bacteria of putre- 

 faction, as shown by the following experiment 

 made in New Orleans at a time when yellow fever 

 was not prevalent : 



Exp. No. 13. October 7, 9 A. M. Injected 

 into right flank of rabbit 1.35 c. c. of water shaken 

 up with a little material scraped from the surface 

 of gutter-mud in front of my laboratory. The 



