14 



SPECIFIC GRA VITY TABLES. 



IV. Hydrates. 



Name. 



20 Sulphuric acid. 



"! ,< « 



22 Selenious « 



23 Ferric hydrate. 



Formula. 



H 2 S 4 . 



« 



H, Se 3 . 



Fe, 0,. 3 H, O. 



Specific Gravity. p , l & 



1.857, o.° 

 1.85289, o.° 



3.123. 



3-77- Precipitated. 



Point. 



Melting 

 Point 



AUTHORITIES. 



