278 SALTING AND WORKING OF BUTTER 



of this impurity. According to analysis of the best daily salt 

 used in Denmark, the composition is as follows: 1 



Per Cent 



Pure salt (sodium chloride (NaCl)) 97-49 



Magnesium chloride (MgCl 2 ) 18 



Gypsum (calcium sulphate (CaSO4)) 05 



Sodium sulphate 21 



Water 2.07 



100 . 00 



The purest American dairy salt has the following composition : 2 



Per Cent * 



Pure salt 99 . 18 



Magnesium chloride 05 



Gypsum 54 



Calcium chloride (CaCb) .19 



Insoluble matter 03 



Moisture.. .OT 



100.00 



Good, moisture-free salt will contain 99 per cent or over of 

 sodium chloride (NaCl). Any substance other than this is an 

 impurity to the extent to which it occurs. 



Salt readily absorbs odors and moisture. Hence it should 

 be kept in a clean dry place. 



Gritty Butter. " Gritty butter" is a familiar phrase used 

 by expert butter-scorers to indicate that part of the salt is 

 present in an undissolved condition. To most consumers this 

 condition of the salt in butter is objectionable. When properly 

 incorporated, salt should be present in the form of a solution 

 in the butter. The gritty condition of the salt in butter may be 

 due to (i) poor condition of the salt before it is added to the 

 butter; (2) adding so much salt that it cannot be dissolved by 

 the water in the butter. The maximum amount of salt that 



1 Boggild, Maolkeribruget, Denmark. 



2 Bui. No. 74, Wis.. by F. W. Woll. 



