8 
Transactions of the Society. 
to find that segregation has taken place. Fig. 12 is a photograph 
of a silver-copper alloy (50 p.c. silver, 50 p.c. copper), which shows 
the separation of the silver-copper eutectic (72 p.c. silver, 28 p.c. 
copper) from the excess copper, the eutectic structure being com- 
posed of laminae in juxtaposition. 
In conclusion, it should be stated that the micro-examination 
of metals is now a very specialized subject, and therefore it has 
been possible to deal only in a cursory manner with very few of 
the aspects of the subject in this paper. 
