336 P. Eskola— Silicates of Strontium and Barium. 



Fig. 1. 



1700 



1600 



500 - 



1400 - 



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5r0-5\0n and tri dymitc 



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SL5r0-5iO9 5rO5i0n 



Fig. 1. — Temperature-concentration diagram of the binary system 

 Sr0-Si0 2 . 



The density, at 30°, determined with a pycnometer, is 

 3.650. This is calculated as real density, compared with 

 water at 4° and making correction for the buoyancy of 

 air. Jaeger and Van KLooster 9 found d 4 =3.652 at 

 25.1°, in good agreement with that found by me which 

 gives d 4 =3.653. 



9 Log. cit. 



