236 MM. Gruby and 0. Delafond on the 



distinction of kind or of sex, and whatever be the state of 

 leanness, of fatness, of health and of disease, of these animals. 



9th, The microscopic filaria, even when present in the ap- 

 proximate number of near 224,000. do not alter the instinc- 

 tive faculties of the dogs, and do not at all weaken the mus- 

 cular energy of these animals. 



lOM, The vermiferous blood of the dogs presents no very 

 notable modifications in its physical characters, and in the 

 proportionate weight of its organic and inorganic principles. 



11th, The microscopic hematozoa transfused with from 

 150 to 300 grammes of a liqueur glohuleuse defihrince into the 

 vessels of nine dogs, whose blood contained no worms, dis- 

 appeared from their blood in from the eighth to the fortieth 

 day. The dogs were killed, and the filaria were neither 

 found in the fluid secretions, nor in the tissues, nor in the 

 different cavities. 



Vlth, In two dogs, differing in kind and age, having no 

 filaria in their blood, into whose vessels from 200 to 800 

 grammes of vermiferous defibrinised blood were ejected, the 

 filaria have continued to live in the blood during more than 

 three years, or up to their natural death. When opened and 

 dissected these dogs have not presented any filaria save in 

 their blood. 



13M, The microscopic hematozoa of the blood of the dog 

 transfused with the liqueur glohuleuse defibrince into the 

 vessels of two rabbits, have continued to live in the blood of 

 one of them during eighty-nine days, after which time the 

 filaria disappeared from the blood. At the autopsy of this 

 rabbit the filaria were not found again in the tissues. 



14M, The microscopic filaria transfused with the defibrin- 

 ised liquor which we have mentioned into the blood of six 

 adult frogs, two of which already had filaria in their blood, 

 continued to live in the vital fluid of these animals during 

 eight days, or during the time the globules of the dog's 

 blood appeared unchanged among the globules of the frog's 

 blood. On the ninth and tenth day, the globules of the dog's 

 blood being altered, the microscopic filaria injected with it 

 disappeared, and the eight frogs died of a scorbutic disease. 

 These transfusions then demonstrate that the microscopic 

 filarious blood cannot continue to live, either in the blc^ocf of 



