AIR- GERMS AND SPONTANEOUS GENERATION. 97 



water, which had been kept for two or three months in a heated 

 stove, without any development of organisms, to an apparatus ar- 

 ranged like that in Fig. 3. 



55 



O 



3 



o 



a 



4 

 h< 

 Z, 

 







CO 



a 

 a 



o 

 <-) 



O 

 O 



tH 



O 

 S3 



R 



O 







H 

 A 



I I 



a 

 3 

 H 





 o 

 &< 



73 

 P 

 H 





 -1 

 A. 

 p< 



5 



s 

 a 



TO 

 O 



The pointed end of the flask passed into a strong glass tube .39 to 

 46 inch in its inner diameter, within which he had placed a piece of 

 tube of small diameter, open at both ends, free to slip into the larger 

 tube, and inclosing a portion of one of the small plugs of cotton 

 loaded with dust. The larger glass tube is bound to a brass tube in 

 form of a T, furnished with stopcocks, one of which communicates 

 vol. ix. 1 



