151 



Rose's analysis of the sphene of Zillerthal gave the following results : 

 silica 32-29; titanic acid 41*58; oxide of iron 1-07; lime 29*60. 

 The analysis was effected by sulphuric acid, and the details are given 

 in the Phil. Mag. fy Ann. xxvii. p. 560. 



A new process for the analysis of this mineral, invented by Fuchs, 

 is described in Berzelius' Annual Rep. for 1845, p. 178. 



The Lederite of Shepard, it now appears, is identical with common 

 sphene in its crystallographic and other characters. The accompanying 

 figure illustrates its crystallization. 



ADDITIONS 



Of Mineral Species found in this State since the date of the publication 

 of the Mineralogy of New- York, 



COLUMBITE. 



This mineral has been found by Dr. Leonard, associated with chryso- 

 beryl at the remarkable locality in the town of Greenfield, Saratoga 

 county. 



LOXOCLASE. 



This name has been applied by Breithaupt to a mineral received from 

 Prof. Shepard. It was found in Hammond, St. Lawrence county, with 

 pyroxene, graphite and calcareous spar. In many respects it resembles 

 oligoclase (soda spodumene ;) color yellowish-gray, yellowish-white, pea 

 yellow and blueish gray. Lustre between vitreous and greasy; pearly 

 on the most perfect cleavage surface. Primary form an oblique rhom- 

 bic prism. P. onM. 93° 45', P. on T. 115° 30'. 



