22 ON PLATE-CASTING. 



beneficial to * strike up ' the plates, as the im- 

 mense power obtained under the point of the 

 burnisher seems to do all that is necessary. I 

 may mention that the only compensation for con- 

 traction in this piece occurred in drying the sand 

 moulds, and the only solder used attaches the 

 pins to the plate." 



