40 MODERN BUTTER MAKING. 



45. Mann's acidity test apparatus, 1 iron burette 

 stand, with cork lined clamp ; 1, 50 c.c. burette, grad- 

 uated in tenths of a cubic centimeter; 1, 50 c.c. pi- 

 pette; 1, 50 c.c. beaker; 1 glass funnel; 1 glass stir- 

 ring rod ; 1 pinch cock and rubber connections, with 

 glass tip ; 1 gallon of one-tenth normal solution, and 

 1 4-oz. bottle of phenolphtalien. 



46. The Fanington alkaline tablet solution, The 

 Farrington tablet solution can be used in three 

 ways : First by dissolving five tablets in 85 c. c. of 

 soft water; second by dissolving five tablets in 97 

 c. c. of soft water, and third by dissolving one tablet 

 in one ounce of soft water. In using the first method 

 a 20 c. c. pipette is used. One c. c. of the solution 

 (five tablets to 85 c. c. of water) will neutralize .01 

 per cent acidity in the sample tested, and 20 c. c. of 

 the solution would neutralize .20 per cent acidity. 

 In using the second method (five tablets to 97 c. .c. 

 of water) a 17.6 c.c. pipette is used. The number 

 of c. c. of solution used represents, as in the first 

 method, the same amount of acidity neutralized; 

 thus, if 20 c. c. of solution have been used the acidity 

 is .20 per cent. 



This method is a very desirable one as it needs no 

 mathematical calculation and a 17.6 c. c. pipette can 

 be found in every creamery. The tablets will keep 

 better than a solution ; they can be procured by mail 

 from creamery supply houses and the solution is 

 very easily prepared. With Mann's method the 

 solution is as a rule prepared by a chemist. 



