BY H. G, CHAPMAN. 



Table ii. 



441 





Age 



Temper- 





Blue 



Bed 





Time. 



of 



ature of 



Acidity. 



litmus 



litmus 



Remarks. 





Milk. 



Milk. 





paper. 



paper. 





4.45 a.m. 



1 min. 



32°C 



14° 



faint red 



faint blue 





5.45 



1 hour 



28°C 



13° 









6-45 



2 hours 



26°C 



13° 



• i 







7.45 



3 „ 



27°C 



13° 









8.45 



4 „ 



28°C 



125° 









9.45 



5 „ 



30° C 



12° 



red 







10.45 



6 „ 



32°C 



12° 









noon. 



7| „ 



34°C 



11° 









12.45p m. 



8 „ 



34°C 



12° 



5 5 



j > 





1.45 



9 „ 



36°C 



13° 









2.45 



10 „ 



35°C 



13° 









3.45 



11 „ 



35°C 



18° 









4.45 



12 „ 



35°C 



21° 



very red 







5.45 



13 „ 



34°C 



28° 



very red 



unchanged 



smell suspicious, 

 not acid to taste 



6.45 



14 „ 



33°C 



29-5° 







sour to taste 



6.45 a.m. 



26 „ 



— 



90° 







thick and sour 



9.45 a.m. 



29 „ 



— 



90° 



" 



>> 



thick and sour 



These figures show that the acidity slightly diminishes until 

 the eighth hour and then increases slowly until the eleventh hour, 

 after which the rate of increase is greater. 



The figures for a large number of milks which had been mixed 

 together have been determined at the delivery depot of a milk 

 factory 

 under three hours 



The longest interval between milking and titration was 



These results are recorded in Table iii. 

 Table iii. 



No. 



Acidity. 



No. 



Acidity. 



1 



12° 



11 



13o° 



2 



12° 



12 



12° 



3 



12-5° 



13 



142° 



4 



12-5° 



14 



14-5° 



5 



13° 



15 



14° 



6 



13° 



16 



13-5° 



7 



140 



17 



14° 



8 



15° 



■ 18 . . 



13-5° 



9 



13° 



19 



12-5° 



10 



13° 



20 



13-5° 



These figures show the acidity to vary from 12° to 15 c 



