156 



The Philippine Journal of Science 



1913 



per cent. The ratio of lactose, protein, and ash differs greatly 

 from cow's milk, being about 5:7:1. This agrees approxi- 

 mately with the figures 5:6:1 obtained by Meggit and Mann l 

 for the milk of Indian buffaloes. A very different ratio was 

 obtained by Peppel and Richmond 2 for the milk of the Egyptian 

 buffalo, their figures being 6 : 5 : 1. The percentage of lactose 

 in carabao's milk is approximately the same as in cow's milk. 

 The protein is much higher, higher in fact than in the milk of 

 any buffalo. 



Again, whereas the ratio of casein to albumin in cow's milk 

 is as 1 : 7.5 and in the case of the Egyptian buffalo, 1 : 5.5, in the 

 case of the carabao, it averages 1 : 10. However, the amount 

 present fluctuates considerably as was found by the varying de- 

 gree of ease with which an albumin-free serum was obtainable 

 for the serum determinations. 



The calculation of total solids by the Richmond formula, 



T. S. 



- ^ + -=r- -f 0.14, was found to give accurate results as is 

 4 5 



shown above, and is available for use if any large number of 

 control analyses have to be made at any time. The determination 

 of the total protein by means of the aldehyde figure using the 

 common factor 0.171 was not so successful, and it would seem that 

 better results might be obtained using the factor 0.181. 



The total mineral matter shows about the same ratio to the 

 solids not fat in carabao's as in cow's milk, but the ratio of phos- 

 phoric acid and calcium to ash is greater in the former than in 

 the latter. As usual, the principal ash constituents are fairly 

 constant, and a determination of the phosphoric acid 3 might be 

 of assistance in examination of samples suspected of being 

 watered, as confirmation of adulteration. 



In order to confirm the above results, an estimation of fat and 

 total solids was made on samples of genuine milk from 105 

 animals with the following result: 



Constituent. 



Maxi- 

 mum 

 content. 



Mini- 

 mum 

 content. 



Average 

 content. 



Milk fat 



Per cent. 

 17.42 

 28.70 

 15.16 

 84.16 



Per cent. 



5.66 

 15.84 



8.68 

 71.30 



Per cent. 

 10.44 

 21.42 

 11.28 



78.58 



Total solids 





Water - 





'Mem. Indian Dept. Agr. (1912), 2, 195. 



2 Trans. Journ. Chem. Soc. (1890), 51, 754.. 



8 A new method of milk testing. Analyst (1908), 33, 273. 



