NOTES ON THE BACTERIOLOGICAL EXAMINATION 

 OF WATER FROM THE SYDNEY SUPPLY. No. II. 



By Oscar Katz, Ph.D., M.A. 



Owing to some unavoidable circumstances, especially to the want 

 of appropriate material for cultivating media, I was not able to 

 continue, as I wished to do, the bacteriological examination of 

 Sydney Water, until November 18th, that is for about two 

 months (vide these Proceedings 1886, p. 912). From that date, 

 however, up to December 21st, I was able to test nine samples of 

 water from the Sydney Supply, derived from the tap in the 

 laboratory of the Linnean Hall. On October 17th, I had the oppor- 

 tunity of subjecting a sample of water from the Prospect Reservoir 

 to a bacteriological test. 



The results of the examination of the first-named samples may 

 be seen in the following table : — 



The mean number of colonies out of these nine single tests amounts 

 to 221 for one cubiccentim. of the water in question; the mean of 

 the liquefying colonies is 82, i.e. about 37 p.c. 



