io2 GUIDE TO DAIRYING IN SOUTH AFRICA 



Every farmer should own a Babcock milk-testing 

 outfit, which should include at least 



2 milk-test bottles. 

 2 cream-test bottles, 

 i milk pipette measuring 17^6 c.c. 

 i small 9 c.c. 



i 17*5 c.c. acid measure, 

 i bottle sulphuric acid (specific gravity r825) 

 sufficient for 100 tests. 



Always keep the sulphuric acid where children 

 and natives cannot reach it. Always stir the cream 

 or milk thoroughly from which a sample is to be 

 tested, for on standing the fat rises, and if a sample 

 be taken from the top the result is an unfair and 

 inaccurate test. 



Composite Sample. 



A composite sample is one consisting of a 

 number of samples taken from the same source. In 

 taking the composite sample of one cow's milk a 

 quantity of milk must be taken at each milking in 

 proportion to the amount of milk yielded. To do 

 this, pour the milk into a can possessing perpen- 

 dicular sides and flat at the bottom of the can. 

 Introduce a glass tube to the bottom of the can, 

 holding the tube straight up and down, and by 

 placing a finger or thumb on the open end, with- 

 draw a column of milk and run it into the bottle 

 set aside for sample. This may be kept sweet by 

 potassium bichromate, about as much as will cover 

 the point of a penknife being used, placed in the 

 bottle. Sometimes a few drops of formalin are used. 



