80 



A Description of a new Mineral Species. 



According to M. Dufrenoy, by the reflective goniometer, the an-' 

 gles are 



M on X 130° 5' or 130° 10' 

 X on X' 142° 10' 



In the second edition of our memoir on the Mineralogy and Geo- 

 logy of Nova Scotia, we compared this mineral with the Davina of 

 Monticelli and Covelli, which we had not then seen. It differs very 

 obviously from this mineral, in external, as well as chemical charac- 

 ters, and composition. 



The following is the composition of Davina, which the reader may 

 compare with the results of Mr. Hayes's analysis of our new mineral. 



Davina. 



Phosphoric acid, 3.480 

 Oxide of Iron, .140- 

 Foreign matter, .030 

 Water, 8.580 



Loss, 1.400 



We propose for this mineral, the name of Ledererite, in honor of 

 the Austrian ambassador to the United States, Baron Lewis Von Le- 

 derer, who has done so much, by his zeal in this department of na- 

 tural history, to encourage and facilitate its study. 



Analysis of the Ledererite ; by Mr. A. A. Hayes of the Roxbury 



Laboratory. 



The Ledererite presents the following characters. • 



When heated in a small raattrass, it becomes white and opake and 

 gives off water, free from acid, or alkali ; a slight empyreumatic odor 

 is perceptible. 



In the forceps, before the blowpipe flame, it becomes white and 

 divides at the natural joints ; at a higher temperature it fuses into a' 

 white enamel, which can be rendered more vitreous by continuing 

 the blast; a few bubbles are disengaged when it is thus treated. 



On a platina wire, with its bulk of soda, a fragment fuses, with 

 effervescence, into a white enamel, which is unaltered hy exposure to 



