APPLIANCES. 

 GKINDSTONES AND FEAMES. 



A- grindstone, to do good service, should be at least 

 three feet in diameter and two and one-half to three 

 inches in thickness, having a bevel on each side of the 

 face for grinding on. It should be quite free from hard 

 spots of iron pyrites, which are injurious to tools, al- 

 though they may be taken out with a sharp-pointed 

 punch. If it is not centered truly it will work out of 

 shape and soon require trueing up. It should run as fast 



Fig. 70. GRINDSTONE SET. 



as possible, as it does its work better and more quickly. 

 To prevent it from throwing water, a piece of bagging 

 should be fastened to a staple fixed across the frame on 

 each end (as shown in figure 70), but not so close as 

 to grind it out ; this will catch the excess of water and 

 yet keep the stone wet enough and clean it. The stone 

 should be kept in the shade and never in water, which 

 softens it and makes one side wear faster than the other. 

 The water box should have a hole in it to let out the 

 water and keep the stone dry when not in use. In grind- 

 ing, it should mostly turn from the tool, and if used 

 otherwise, great care should be taken by the one who 

 holds the tool, not to gouge the stone. 



Figure 71 shows a novel style of frame for a grind- 

 stone. The frame proper consists of the iron part or 

 bearing of a reaper reel. The arms to which the reel 



