JVeio Mineral from Sussex County, New- Jersey. 41 



C. 



(1) Another portion of the powdered mineral was exposed 

 Tor an hour to a red heat, in a platina crucible ; its weight 

 was reduced from 50 to 48.25 grains. 



(2) It was then treated as before, (B. 3) with nitromuriatic 

 acid, the insoluble portion fused with caustic potassa, he. as 

 in (B. 4), and the whole of the liquors united, as in (B. 5). 

 The mixture was then concentrated to separate the excess of 

 acid, and again diluted with water. Crystals of Sulphate of 

 Soda thrown in, were after a few hours dissolved ; a precipi- 

 tate ensued, which, washed and dried, weighed 8.62 grains. 

 If the representative number of Cerium be 92, this, when re- 

 duced, will give 6.06 grains of peroxide of Cerium. 



(3) The liquor whence the Cerium had been precipitated, (2) 

 being tested by the Oxalate and Benzoate of Ammonia, showed 

 the presence of Lime and Protoxide of Iron. 



The more important results of the analysis B being thus 

 confirmed, it was not considered necessary to extend the pro- 

 cess farther. The results may be, it is believed, depended 

 upon, except so far as the equivalent numbers of Ferrocyanic 

 Acid and Cerium enter into the calculations of (B. 11), and 

 (C. 2), and the doubt whether a small proportion of some 

 other metal may not have been thrown down in (B. 11). 

 This analysis shows the following to be the constitution of 

 the substance. 



Silex B. (4) 16.30 grains. 



Peroxide of Cerium . B. (8) 6.16 

 Protoxide of Iron . B. (10) 10.50 



Alumine B. (11) 1.84 



Lime B. (12) 12.04 



Water C. (1) 1.1'. 



Loss 1.41 



50.00 ffi-ains. 

 6 



