1820.] Physical Science during the Year 1819. 99 



Silica 41 



Alumina 22 



Lime 22 



Magnesia 3 



Iron 6 



Manganese 2 



Potash 1 



97 

 (Annals of Philosophy, w. 146.) 



7. Celestine. — A variety of this mineral has been found at 

 Tfbrten, near Hanover, composed according to M. Gruner, of 



Sulphate of strontian 73-000 



Sulphate of barytes 26-166 



Ferruginous alumina 0-213 



Loss. 0-621 



100-000 

 (Ibid. XV. 283.> 



8. £//c/flse.— This rare mineral has been lately analyzed by 

 Berzelius, and found to be composed of 



Silica 43-22 



Alumina 30-55 



Glucina 21-78 



Oxide of iron 2-22 



Oxide of tin ^'70 



98-47 



Berzelius considers it as G S + 2 A S. (Ann. de Chim. et 



de Phys. xi. 216.) , i t^ r r- i, 



9 IVamUite. —^h:i% mmeral has been analyzed by Prot. tuchs 

 and Prof. Berzehus. They both concur in finding it to be a 

 hydrous phosphate of alumina. The followmg table exhibits the 

 results which they obtained : „ ,. 



Fuchs. Berzelius. 



Alumina f2 



Phosphoric acid 35-1- 



Fluoric acid 



Lime . 



Oxides of iron and manganese .... — 



Water 28-00 



35-35 



33-40 



2-06 



0-50 



1-25 



26-80 



100-32 99-36 



(See Annals of Philosophy, xiv. 278, and Ann. de Chim. ei de 



Phys. xii. 16.) , „>/••. 



Professor Fuchs has shown that the mineral calleu /asionite 

 agrees exactly in its composition with wavellite 



