868 BOARD OF AGRICULTURE. 



butter and the substitutes therefor, will be found to contain only 5 per cent., or 

 less, of soluble ncid. It may be granted that no unadulterated butter will contain 

 less than 4 per cent, soluble acid, while the limit might well be placed at 4.5 per 

 <!ent. without excluding any desirable genuine butter. The estimation, therefore, 

 of the soluble acid is an argument convincing alike to the chemist and the court 

 whenever the purity of butter is called in question. 



In the following table will be found analyses of thirty-six samples of butter, 

 oleomargarines and fats used in butter adulteration. Nearly all of these samples 

 were bought in the open market. 



Nos. 1708, 1712, 1717 and 1718 were obtained directly from the manufacturers. 



The melting point is given in degrees of the Centegrade scale. To change into 

 Fahrenheit scale, multiply by 9-5 and add 32: 



