558 N. L. Bowen — The Binary System. 



(f) Change of phase at ' Knickpunkt.' 



33 3 Ne 1357° 6 hrs. Cg only 



34 5 Ne 1357 6 hrs. Cg & glass trace . 



35 10 Ne 1357 6 hrs. Cg & glass 



36 20 Ne 1357 6 hrs. Cg & glass 



37 30 Ne 1357 7 hrs. glass only 



38 3 Ne 1346 6 hrs. Cg only 



39 5 Ne 1346 6 hrs. Cg & Ne 



40 10 Ne 1346 6 hrs. Cg & Ne 



41 20 Ne 1346 6 hrs. Ne & glass 



42 30 Ne 1346 6 hrs. glass & Ne . V 



(g) Eutectic composition. 



43 50 glass 1304° 2 hrs. An & glass 



44 40 glass 1304 2 hrs. Ne & glass 



45 47-5 glass 1304 2 hrs. An & glass 



46 46 glass 1304 1 hr. An & glass 



47 45 glass 1304 1 hr. Ne & glass 



(h) Solid solution An in Ne. 



48 30 glass 1295°ca 2 days Ne only 



49 32 glass 1295°ca 2 days Ne only 



50 35 glass 1295°ca 2 days Ne & An (mere trace) 



(k) Solid solution Ne in An. 



51 98*5 glass 1250° 2 days An only 



52 98 glass 1250 2 days An & Ne (trace) 



53 97 glass 1290 2 hrs. An & Ne 



(1) Solid solution An in Cg. 



(See also change of phase at ' Knickpunkt. ') 



54 3 glass 1350° 6 hrs. Cg only 



55 5 glass 1350 6 hrs. Cg & Ne (trace) 



Many of these quenching results are worthy of special dis- 

 cussion, but this may be undertaken more profitably after they 

 have been combined with the heating curve results and plotted 

 on a temperature-composition diagram (Diagram II : Equili- 

 brium Diagram). 



Explanations of Signs and Terms. 



In Diagram II the circles indicate heating curve breaks ; the 

 numbered crosses indicate temperatures and compositions at 

 which quenchings were made, the numbers corresponding with 

 those in Table II where the phases present are given. The 

 data make possible the drawing in of the curves separating the 

 fields of stability of the various phases. On each field the 

 phases present at equilibrium are marked. Nephelite is used 



