580 



JV. L. Bowen — Melting Phenomena of the 



Table II. 



AbiAn £ 



Date Initial 



1912 Condition 



Nov. 24 Cryst. 

 Nov. 24 Cryst. 



Nov. 24 Cryst. 



Temp, 

 microvolts 



Temp. 



degrees. 



Time 



Eesult 



15110 1470 1 hr. 



15000 1461 1 hr. 



14900 1453 1 hr. 



Solidus 1465° ± 4° 



Small amount of glass formed. 

 No change apparent. 

 No change apparent. 



Nov. 



26 



Cryst. 



15800 



1530 



|hr. 



All glass. 



Nov. 



26 



Cryst. 



15750 



1526 



inr. 



All glass. 



Nov. 



26 



Cryst. 



15720 



1522 



ihr. 



All glass. 



Nov. 



27 



Cryst. 



15700 



1520 



1 hr. 



Glass and a very few crystals, 



Nov. 



27 



Glass 



15650 



1516 



1 hr. 



Glass and a very few crystals, 









Liquidus 1521° ± 2 













AbjAna 





Nov. 



22 



Glass 



15270 



1484 



1 hr. 



Glass and a few crystals. 



Nov. 



22 



Cryst. 



15340 



1489 



1 hr. 



Glass and crystal specks. 



Nov. 



22 



Cryst. 



15370 



1492 



1 hr. 



Glass only. 



191? 



; 













Jan. 



7 



Cryst. 



15300 



1486 



1 hr. 



Glass and a few crystals. 



Jan. 



t 



Cryst. 



15350 



1490 



1 hr. 



Glass only. 









Liquidus 1490° ± 2' 



3 



191S 



5 













Nov. 



23 



Cryst. 



13900 



1368 



1 hr. 



No change. 



Nov. 



23 



Cryst. 



14010 



1377 



1 hr. 



A very little glass formed. 



Nov. 



23 



Cryst. 



14200 



1394 

 Solidus 1372 



1 hr. 



° ± 4° 



Glass formed. 











AbiAnj 





Dec. 



8 



Cryst. 



13000 



1291 



1 hr. 



Minute quantity glass. 



Dec. 



8 



Cryst. 



12900 



1283 



1 hr. 



No change. 



Dec. 



12 



Cryst. 



13300 



1316 

 Solidus 1287' 



1 hr. 



5 ± 4° 



Considerable amount of glass. 



Dec. 



17 



Cryst. 



14650 



1430 



1 hr. 



Glass and crystals. 



Dec. 



17 



Cryst. 



14770 



1440 



1 hr. 



Glass and crystals. 



Dec. 



17 



Cryst. 



14800 



1442 



1 hr. 



Glass and a few needle crystals. 



Dec. 



20 



Glass 



14800 



1442 



1 hr. 



Glass and a few stout crystals. 



Dec. 



20 



Cryst. 



14870 



1449 



1 hr. 



Glass and extremely rare 

 crystals. 



Dec. 



20 



Cryst. 



14890 



1452 



1 hr. 



Glass only. 









Liquidus 1450° ± 2 C 













Ab 2 An 



ii 





191S 















Jan. 



3 



Cryst. 



12600 



1257° 



1 hr. 



Glass formed. 



Jan. 



3 



Cryst. 



12200 



1223 



1 hr. 



Glass formed. 



Jan. 



8 



Cryst. 



12000 



1209 



1 hr. 



Minute quantity glass. 



Jan. 



8 



Cryst. 



11900 



1200 



1 hr. 



No glass discernible. 



