Testing Cream for Acidity 



39 



cubic centimeters, the standard of measurement used 

 in chemistry). 



Add a couple of drops of indicator to the cream in 

 the glass. We are now ready to add the neutralizer, 

 but will first explain the apparatus for measuring the 

 neutralizer the Nans Outfit illustrated here. 



The outfit comes 

 "Knocked down" so it is 

 first necessary to put it 

 together as shown in the 

 illustration, being care- 

 ful to have all joints 

 tight. 



The neutralizer is 

 shipped in powder form 

 to be mixed with water. 

 This saves breakage on 

 bottles and express 

 charges on the water. 



The large bottle con- 

 tains the neutralizer. 



The glass tube (C) 

 with figures to 10 c.c. 

 (cubic centimeters) is 

 called a burette. This 

 is used to measure the 

 amount of neutralizer 

 that is added to the 

 cream being tested for acidity. 



The pinchcock (D) when pressed between the 

 fingers, allows the neutralizer to run out of the 

 burette as slow or as fast as desired. 



To fill the burette: Hold the rubber vent tube 



