262 BACTERIOSCOPICAL EXAMINATION OF ICE SUPPLIED IN SYDNEY, 



temperature at which these culture-tubes were kept, amounted in 

 its maximum to 79°F. = 26J°C., in its minimum to TTF. =21|°C. 

 The colonies were counted after 40-70 hours' incubation ; the 

 appearance in the tubes of rapidly liquefying colonies rendered an 

 early counting now and then necessary. Where it was possible, 

 the colonies were counted throughout ; in other cases the number 

 of germs was calculated from the average number of colonies in 

 6-10 n^ni., or (one case) in quite as many -J Qcm. 



I will now put together the I'esults of the examination of the 

 ice-samples from the three works in tables, the arrangement of 

 which scarcely needs any further explanation. 



"NEW SOUTH WALES FRESH FOOD AND ICE COMPANY." 



"5 



2 * § 



.Sao. 



* £ £ 



^1 



c 

 o 



Interval in 



Temperature of incubation. 



Colonies 



either 



counted 



throughout 



or calculated. 



Num 

 cok 



in 



1 LCUl. 



)er of 

 )nies 



in 

 J ccm. 



1888. 



1888. 













Jan. 18 



Jan. 



20 



40 



75-79°F. = 23^26J°C. 



Counted . . . 



74 

 67 



31 

 27 



„ 26 



n 



28 



53 



74-77°F. = 23i-25°C. 



Counted . . . 



6 



7 







1 



,, 27 



>> 



29 



48 



74-77°F. = 23J-25°C. 



Counted . . . 



81 

 53 



.H7 



„ 30 



Feb. 



1 



50 



73-78°F. - 22^25^0. 



Counted . . . 



R2 

 1U7 



29 

 44 



Feb. 1 



>) 



4 



64 



74-78°F. = 23i-25f C. 



Counted . . . 



6 

 5 



I 



„ 4 



)> 



7 



70 



73-5-77°F. =23iV25°C. 



Counted . . . 



2 



3 



1 



,, 7 



j> 



10 



68 



73-77°F. = 22^-25X\ 



Counted . . . 



3 

 1 



1 

 



„ 10 



>» 



13 



70 



72-5-76°F. = 22i-24^°a 



Counted . . . 







1 



n 

 



» 11 



15 



14 



60 



74-75°F. = 231-23^0. 



Cal.(lccm.) 

 Ctd.(iccm.) 



498 

 80! 



2ft3 

 215 



„ 15 



)> 



17 



48 



72-74-5°F. = 22^-23}rC. 



Calculated 



17671 

 17374 



mo 



89:« 



„ 17 



» 



20 



70 



71-74°F. = 2l5-23rC. 



Counted . . . 



8 

 5 



2 

 2 



„ 19 



>> 



21 



48 



72-76-5°F. = 22^24}fC. 



Counted , . . 



400 

 414 



221 

 187 



