Intelligence and Miscellaneous Articles. 71 



netism, the globule obtained by exposing a fragment of the mineral 

 to the blast of the blowpipe being magnetic, as well as the fragment 

 itself, and even in a higher degree. 



From the description given * of the Tachylite of Breithaupt, this 

 mineral should much resemble the isopyre. Its specific gravity is 

 much lower, being only 2*5. . . 52*54, so as to preclude the possibility 

 of their belonging to the same species. It occurs in basalt and 

 wacke at Saesebuehl, near GofHtingen, likewise only massive. 



Dr. Turner has analysed the isopyre, and finds its composition to 

 be Silica 47*09 



Alumina 13*91 



Peroxide of iron 20*07 



Lime 1543 



Peroxide of copper. . ] *94 



98*44 



OSMELITE, A NEW MINERAL SPECIES. 



Professor Breithaupt, of Freyberg, gives the following account 

 of this substance : 



The name of this mineral is derived from ocrpj (smell) and \iQo$ 

 (stone). Its characters are as follows : Colour grayish-white, which 

 passes into a tint between smoke and yellowish -gray. Planes, which 

 have been exposed to the weather, have their colour changed into 

 dark hair-brown. It consists of thin prismatic concretions, either 

 scopiformly or stellularly arranged, and these again collected into 

 coarse granular concretions, forming massive portions. Cleavage 

 visible only in one direction, owing to the thinness of the prismatic 

 concretions, which indeed pass into fibrous. Its form is conjectured 

 to be rhomboidal ; is strongly translucent : it feels rather greasy : its 

 hardness, owing to the fibrous structure, is difficult to determine. It 

 appears, however, from some trials on the file, to be intermediate 

 between that of fluor-spar and apatite. Specific gravity =2*792 

 to 2*833. 



It gives out, in the common temperature of a room, a distinct 

 clayey smell, which is increased by breathing on it, or when brought 

 from a warm to a cold place. In the mouth it tastes like clay, and 

 appears as if it would dissolve like clay, although no change takes 

 place. 



This species is distinguished from the zeolites by its greater spe- 

 cific gravity. It approaches to tabular spar in hardness and specific 

 gravity, but in no other characters. 



It occurs superimposed on calcareous spar, mixed with datolite, 

 — in veins in trachyte, in a hill at Niederkirchen, near Wolfstein, 

 on the Rhine. 



HYDROSILICITE, — A NEW MINERAL SPECIES. 



Dr. Kuh, in his inaugural discourse, entitled " De Hydrosilicite, 

 novafossilium specie, Berlin, 1826," informs us, that he found, in the 



* Leonhard, 2d edit. p. 781. 



serpentine 



