80 



Effect of Internal Influences. 



quarter is " blind," the milk contains stringy clots and other 

 things. 



The keeping of milk records and the taking of milk samples 

 at least every four weeks, should be required of all owners of 

 animals which produce milk for city consumption and those fur- 

 nishing it to wholesale milk dealers. 



Together with the visible changes in the milk, changes of the 

 value of the chemical and physical properties occur which have 

 been especially studied by Guillebeau and Hess, Schaffer and 

 Bondzynski, E. Seel, Mezger, Fuchs and Jesser and Mai and 

 Rothenfusser. 



These changes in the contents and properties are therefore 

 especially important since frequently values are obtained which 

 suggest adulteration with water. Irreproachable comparative tests 

 of milk obtained directly from the stable may indicate however 

 that in the specific cases the investigations were being made with 

 abnormal milk. 



.According to Schaffer and Bondzynski 's examinations the milk from cows affected 

 with mastitis showed the following values: 



Water Solids. Fat 



In non-infectious 



garget 92.83 7.17 0.82 



In yellow gait 89.34 10.66 1.99 



In parenchymatous 



mastitis 90.26 9.74 2.16 



In comparison with healthy 



milk ..87.75 12.25 3.4 



Pro- 

 teid 



4.01 

 6.00 



4.21 

 3.5 



Milk 

 Sugar 



0.53 



1.84 



1.01 

 4.6 



Total % 

 Ash P 2 O 4 



0.79 

 0.83 



0.97 

 0.75 



7.35 



Cl. 

 35.76 



19.21 

 20.0 



27.79 

 14-.0 



The milk sugar content was also considerably diminished ; the amount of mineral 

 substances on the other hand was increased. Guillebeau and Hess give the following 

 values in milk from cows with affected udders: 



Fat 



0.52 

 0.22 

 1.95 

 2.72 

 1.09 

 9.30 

 4.50 

 2.09 

 0.53 

 4.50 

 0.97 

 2.80 



Nitrog- 

 enous 

 subst. 

 6.17 

 4.26 

 2.98 

 3.50 

 5.74 

 8.53 

 5.37 

 6.74 

 5.13 

 5.37 

 16.65 

 7.93 



Milk 

 Sugar 



0. 



4.06 



4.35 



0. 



4.68 



5.14 



2.09 



5.14 

 2.61 



2.04 



Ash 



0.85 

 0.82 

 0.81 

 0.70 

 0.87 

 1.07 

 0.87 

 0.85 



0.87 

 0.71 

 0.91 



In most cases the specific gravity is lower (Seel, Mezger, Fuchs and Jesser) and 

 approaches the normal only towards the end of the disease. In mixed milk from all 

 four quarters the specific gravity is less influenced. 



The quantity of fat, according to Seel, and in some cases of Mezger, Fuchs and 

 Jesser, is very much reduced. The latter authors emphasize the fluctuation of the fat 

 in sudden jumps. The experience of the official milk control station in Munich also 

 gives similar results, at the beginning of the affection frequently finding abnormally 

 high or again abnormally low fat contents of the milk. 



