July, 1913. 



KNOWLEDGE. 



245 



Figure 246. 

 The machine shop at Messrs. W. Watson & Sons' Works, High Barnet. 





Figure 247. 



Making flat surfaces of a casting true 

 with a grindstone. 



Figure 248. 



The machine for drawing out 

 brass tubing. 



Figure 249. 



Milling or cleaning up the parts of a 

 casting. 



