AND WINE MAKING. 



145 



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

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

 from $3 to $10. 



Figure 15 shows must scale (silver) and test tube. With 



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



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



^N AciDiMBTEE. — The one invented and patented by 



Henry Twitchell is simple, and can be used with accuracy 



Fig. 16. — ACIDIMETER. 



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

 practice to work correctly with either Otto's or Geissler's. 

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

 ure 16 gives an illustration of the Acidimeter. 

 10 



