AND WINE MAKING. 



201 



used, and can be had in any optical establishment. They 

 are made of glass, platina, or silver, at prices ranging 

 from $3 to $10. 



Figure 29 shows must scale (silver) and test tube. With 

 the scale you should also have a long glass, or tin tube 

 made for the purpose of holding the must while testing it. 



AN ACIDIMETER. The one invented and patented by 

 Henry Twitchell is simple, and can be used with accuracy 



Fig. 30. ACIDIMETEK. 



by beginners. It is a timely invention, as it took long 

 practice to work correctly with either Otto's or G-eissler's. 

 It is accompanied with full directions for its use. Fig- 

 ure 30 gives an illustration of the Acidimeter. 



