468 Profs. Percy Frankland and Marshall Ward. 



In this unsterilised uninfected Loch. Katrine water it will be seen 

 then that distinct, but only very restricted, multiplication took place, 

 which was, as usual, followed by subsequent decline. 



The examinations by phenol-broth culture of the uninfected un- 

 sterilised Loch Katrine water will be best considered along with the 

 similar examinations made of the infected unsterilised waters (see 

 p. 472, et seq.). 



2. Bacteriological Examination of the Infected Unsterilised Loch 

 Katrine Water. 



The Loch Katrine waters, infected with typhoid and the B. coli 

 communis respectively, were periodically examined, both by gelatine- 

 plate and phenol-broth culture, with the following results : 



