AND ITS EFFECTS UPON ANIMAI, LIFE. 



59 



At the death of No. 4, si.\ days after the close of the e.\i)eriment, the loss in its weight was 

 found to liave been caused by the presence of psorosperms in its liver. This organ was literally 

 filled with masses of tliese bodies. The loss of weight in No. 6, in the absence of any other 

 observable causes, may be safely attributed to its position in the series of bell jars, and, therefore, 

 to the impurity of the atmosphere which it breathed. The estimations of the proijortions of CO, 

 and of O jjresent in this bell jar, as found from day to day, denote atmospheric conditions that 

 were undoubtedly unfavorable to the full performance of its bodily functions. It ate less rave- 

 nously than the other animals and was freciuently in a stupid, drowsy condition. 



At the close of this experiment an examination of the blood of these rabbits was also made 

 and the proportion of corpuscles per cubic millimetre determined with the Thoma Zeiss hcemo- 

 cytometer, with the following results : 



No. I, 5,170,000 red, and 24,000 white per cubic mm. 



" 2. 5,337,000 " " 2I,OCO " " " " 

 " 3, 4,510,000 " " 18,000 " " " " 

 " 4, 4,150,000 " " 10,000 " 



" s, 4,950,000 " " 15,000 " " 



" 6, 4,375,000 " " 16,000 " " " " 



Here again there is evidence that the conditions existing in these bell jars were injurious to 

 some extent ; most so in the last jars. No. 4 presents evidence of an influence more serious in its 

 nature than that presented by the other animals, and this has since been found to have originated 

 from causes within its own body. 



Microcytes were noted in the blood of these animals. These immature corpuscles seemed to 

 be more numerous in Nos. 4, 2, and i ; the blood of the other animals presenting only a few of 

 these bodies. 



Thirty-eight days after the termination of the experiment a second examination was made of 

 the blood of the five remaining animals, with the following results : 



No. I, 4,400,000 red, and 20,000 white per cubic mm. 

 " 2, 4,500,000 " " 15,000 



The first and second animals show a slight reduction and the third and sixth an increase in the 

 number of corpuscles. No microcytes or blood-plates were noticed this time. 



The weight of these animals at the time of this second examination of the blood was as follows : 



No. I, 1040 g. 

 " 2, 1045 g 

 " 3, 1265 g 

 " 5, 1405 g 

 " 6, 1545 g 



lost 12 g., since close of experiment. 



a u u (( u 



10 g., 



1 ii (I ii it 



gained 75 g., 



" 53 g-, " " " 



ii ti ii it it 



The loss of weight in the first and second animals may be due to the change of food. The 

 gain in the others is no doubt due to the better atmospheric conditions under which they are now 

 living. 



