The Air of Sew en 



517 



Remarks. 



The lowness of the numbers obtained 

 during effervescence in this case was pos- 

 sibly due to the disinfecting action of free 

 hydrochloric acid. There were no moulds in 

 either case. 



On second day, after which they were too 

 numerous to be counted. On the 5th day 

 300 moulds were counted, but the bacteria 

 were too numerous. 



Ditto. About 100 moulds on 5th day. 



Ditto. About 100 moulds on 5th day. 



Ditto. About 143 moulds on 5th day, 

 one being like the large ones in 7th experi- 

 ment. 



Air of box after passing 

 through drain-pipe. 



During 

 splashing, &c. 



i ' N 



About 370 

 About 380 



About 600 

 About 500 



Without 

 splashing, &c. 



O O 



r-i rH 



rH rH 



Q.uantity of 

 air aspirated. 



900 c.c. 

 900 c.c. 



1 litre. 

 1 litre. 



1 litre. 

 1 litre. 



Mode of producing splashing 

 or effervescence. 



By addition of hydrochloric acid 

 and sodium carbonate to putrid 

 fluid. 



Ditto 





By pouring putrid matter from a 

 height. 



Ditto ' 





By blowing air through putrid 

 fluid. 



Ditto 





No. of 

 experiment. 



Series I. 

 1 







Series II. 



3 







Series III. 

 5 







VOL. XL1I. 



