BACTERIA IX MILK. 



Tke following are his results : — 



TABLE LXVII. 



277 



Average Increase in Acidity of Milk expressed as per cent, of 

 Lactic Acid. 



Treatment. 



Percentage of 



Lactic Acid after 



lapse of — 



Raw Milk 

 kept at 20° C. 



Pasteurised 



Milk kept at 



20° C. 



Raw Milk 



kept at 10° C. 



Pasteurised 



Milk kept at 



10° C. 



hours, 



6 „ 



12 „ 



24 „ 



48 „ 



72 „ 



96 „ 



Per cent. 

 0-131 

 0-168 

 0-254 

 0-449 

 0-696 

 0-711 



Per cent. 

 0-134 

 0-134 

 0-127 

 0-130 

 0-251 

 0-271 

 0-359 



Per cent. 

 0-136 

 0-152 

 0-167 

 0-177 

 0-233 

 0-388 

 0-497 



Per cent. 

 0-134 

 0-129 

 0-131 

 0-129 

 0-129 

 0-130 

 0132 



Average Number of Bacteria per Cubic Centimetre in all .Suniplis 

 under each Treatment. 



Number of 



Bacteria aftci- the 



lapse of - 



hours, 



6 ., 



12 „ 



24 „ 



48 „ 



72 „ 



96 „ 



Description and Treatment of .Snmpk- 



Raw Milk 

 kept at •31' V. 



Pasteurised 



Milk kept at 



2n» c. 



13,522,331 



74,142,857 

 247,651. 2.W 

 457,910,714 



■J45 



6,028 

 1,501,335 



008,079,166 I 320,337,388 

 568,718,500 230,941,250 



Raw Milk 

 kept at 10° I-'. 



17,640,428 



31,457,833 



38,406,785 



124,783,928 



254,678,542 



308,041,666 



975,500,000 562,650,000 



Pasteurised 



Milk kept at 



10° c. 



245 



308 



378 



1,026 



1.5,119 



2,462,492 



37,088,456 



Average Number of Peptonising Bacteria per Cubic Centimetre 

 of Milk. 



Number of Bacteria 

 found after a | 

 lapse of — 



Description and Treatment of .Sample. 



Raw Milk ;it 

 20° C. 



Pasteurised 

 Milk at -20° C. 



Raw Milk at 

 10° C 



Pasteurised 

 Milk at 10° C. 



hours, 



6 

 12 

 24 

 48 

 72 

 96 



621,571 

 4,905,333 

 1,814,583 

 2,927,857 



700,000 

 1,375,000 



11 



188 



259,831 



2,411,163 



31,225,000 



82,208 

 505,333 



1,518,666 



5,272.500 



11,708,750 



12,781,2.50 



32,918,750 



11 



9 



15 



3,143 



856,219 



4,251,219 



