i MILK 67 



to close the test-bottle, which must be well shaken. After the 

 test-bottle has been turned, with the rubber stopper underneath, 

 so that a small air-space is formed at the side opening, the first 

 finger is removed. This must not be done before, otherwise the 

 liquid in the graduated tube will spirt out. The test-bottle 



FIG. 30. The Kolibri Butyrometer. 



is then placed in the stand and another taken up and filled. If 

 the large butyrometer, the one intended for eighty tests, is to 

 be used, the test-bottles must be so arranged that the small 

 opening is always pointing upwards, so that none of the contents 

 flows out. Five test-bottles can be placed in each compartment, 

 and they must be held together in a horizontal position by a 



F 2 



