PACKING BUTTER FOR U. S. NAVY 391 



plus the freight on the machine both ways and plus an insur- 

 ance premium of about $3.50 per year on the value of the 

 machine. 



These prices and terms are naturally subject to changes. 

 They prevailed in the spring of 1918. 



GENERAL DIRECTIONS FOR PACKING BUTTER 

 FOR THE UNITED STATES NAVY. 



Tinned and Tub or Cube Butter Quality. 



"Shall be fresh butter, made from fresh pasteurized cream 

 (held at a temperature of 145 F. for 25 minutes, or at 176 F. 

 for an instant), none of which shall at any time contain more 

 than 0.27 per cent of acid, calculated as lactic acid, for butter 

 scoring 94, or 0.234 per cent for butter scoring 95 (or more acid 

 in 50 c. c. of cream than will be neutralized by 15 c. c. of N/10 

 alkali solution for butter scoring 94, or 13 c. c. for butter scoring 

 95) ; nor shall the cream contain more than 35 per cent butter fat. 



"Shall be strictly of the highest grade of creamery butter, at 

 least two-thirds of which must score not less than 95 and the 

 rest not less than 94 when made. 



"Moisture in the finished product at time of packing must not 

 exceed 13*/2 per cent for tinned butter and 14 per cent for tub 

 or cube butter. There must be no preservative used other than 

 common salt, and that shall be at a rate giving not less than 

 2y 2 per cent or more than 3^4 per cent salt in the finished 

 product at time of packing. 



Inspection and Tests. 



"The ingredients, manufacture, sanitation, packing, boxing, 

 marking, and shipping of the butter shall be subject to inspec- 

 tion by Government inspectors, who shall have full authority 

 to reject any package or lot of milk, cream, or finished butter, 

 and to enforce compliance with the requirements of these speci- 

 fications as well as to demand first-class work in every particular. 



"The Government inspector shall make all the necessary tests 

 to determine that the acid in the milk or cream and the salt and 

 moisture contents in the butter are within the limits specified. 



