CunnincHam—Crystallization of Minerals in Igneous Rocks. 393 
Pt 
= 
ice) 
[o) 
25 
1500. “Sh 
Sa 
1450 5s eae 
“ \ 
+7, 
Rabe 
FE \ 
a = aN Cup1330” 
1300" | — we ah 
-+ Au Pt alloy 
Co} XAg Au; : 
1250 o Ags Cu » % 
41200° bal al \ 
Est 
850, | | 
(0) 10 20 30 40 50 60 70 80 90 100 
100 90 £80 70 60 50 40 30 20 10 (0) 
Fic. 5.—Curves showing the Melting Points of certain Metallic Alloys. 
