19 



TABLB CONTINUED. 



Determination : The flask, after having been thoroughly 

 cleaned, is dried' at 100° C, and left to cool in the desiccator. It 

 is then weighed, and after that filled with water which has previ- 

 ously been freed from air by boiling, and been left to cool in a 

 covered flask. Care must be taken that no air bubbles adhere to 

 the glass. The stopper is then adjusted, and the outside carefully 

 dried. It is then re-weighed, and the temperature observed. The 

 contents of the flask, at a certain temperature, are thus deter- 

 mined. 



After removing the water and drying, the bottle is filled with 

 the milk, which has first been well mixed, using throughout the 

 same precautions. If the temperature of water and milk are not 



