532 



Profs. Percy Frankland and Marshall Ward. 



On comparing this table with that on p. 522, it will be seen that 

 the addition of the salt was highly prejudicial to the typhoid bacilli, 

 the latter exhibiting a most rapid diminution in number, and degene- 

 ration in their vitality. 



Typhoid-infected Steam-sterilised Thames Water inoculated with a 

 few drops of Unsterile Thames Water, to this 1 per cent, of 

 Sodium Chloride 'was added on 12.2.1894. 



On referring to the table on p. 523, it will be seen that in this 

 water, before the addition of the salt, a considerable multiplication of 

 the water bacteria had taken place, but at the time the salt was added, 

 the total number of bacteria only amounted to from 2000 5000 per 

 1 c.c. ; after the addition of the salt, however, an enormous multipli- 

 cation followed. 



We must now see how the vitality of the typhoid bacilli was 

 affected by this enormous bacterial multiplication which took place 

 in the unsterile waters after the 1 per cent, of common salt was added 

 to them. This was, of course, ascertained by the method of phenol 

 broth-culture, the results of which are recorded in the following 

 table : 



