ANALYTIC DATA 3 



are oxydases, that is, decompose hydrogen per- 

 oxid and carry oxygen over to other substances. 



Lecithin is also a usual ingredient of mitk. 

 Nerking and Haensel found a range in cows' 

 milk from 0.03 to 0.11%. 



Mineral Matter. — The ash of milk contains 

 calcium, magnesium, iron, potassium, and sodium 

 as chlorids, carbonates, sulfates, and phos- 

 phates. It does not exactly represent the salts 

 present in milk. 



Richmond has determined the ratio of the 

 ash to the solids not fat in 135 samples of milk. 

 This was found to range from 7.8 to 9.4%, 

 but more usually from 7.8 to 8.5 (average 8.2) %. 

 Many ashes were alkaline to turmeric, litmus, 

 and phenolphthalein, the maximum alkalinity 

 being 0.025% calculated as sodium carbonate. 



Human milk is notable for a low protein 

 content hence the curd is less bulky and more 

 friable than that from cows' milk. The milk 

 of all animals is subject to modification by breed, 

 climate, season, feed, housing, exercise, time 

 of lactation, and in human beings (and possibly 

 in some other animals) by psychic influences. 



As regards the proportion of proteins and 

 lactose, milks of the mare and ass agree closely 

 with human milk. 



Normal milk is an opaque white or yellowish- 

 white fluid, with an odor recalling that of the 



