Report on the Bacteriology of Water. 



277 



Remarks. 



The few other forms were a 



yellow intruder. 

 Not fewer than last. 



On the third day the colonies 

 were so small that we could 

 not count them : the (pure) 

 cultures were, therefore 

 kept longer. 



Plate spoilt. 



Calculated average 

 number of bacteria 

 per 1 c.c. of water. 



Anthrax. 



20,000 

 ? 



8,000 



12,000 

 20,000 

 36,000 

 22,000 



20,000 



Total. 



22,400 

 8,000 



12,000 

 20,000 

 36,000 

 22,000 



20,000 



Number of 

 colonies on plate. 



Anthrax. 



200 



All 



anthrax 

 80 



360 

 200 

 360 

 220 



200 



Total. 



224 



Too many 

 to count 

 80 



360 

 200 

 360 

 220 



200 



Diluted 

 or not. 







O 



td 



,£3 



JO 



Quantity 

 of water 

 used for 

 plate. 



O Hio «l«5 H 10 <o\io -ifa n\ta -*|ia e»|o rn^ic 



6 



Number 

 of days 

 plate 

 was in- 

 cubated 

 at 20° C. 



CO CO IS ^ i ^'1 ^ ^ 



Number 

 of days 



water 

 stood at 



20° C. 



© © H H N -*t ^ !D 



Date of 

 making 

 plate. 



^ <M CO CO rf< CC CD 00 

 r " 1 i— 1 i— 1 i— lrHi-( '»-ir-irH 



t . . . • •-, . . , 



VOL. LIII. 



