96 



The specimen figured came from Cornwall, and is re- 

 markable for having somewhat acicular crystals collected in 

 divaricating bunches, which pervade Blende, Copper Pyrites, 

 and Quartz. Before the blowpipe it melts easily, gives 

 out copious white fumes strongly scented with Garlic, and 

 highly noxious to the lungs : what remains is a small gray 

 globule of magnetic Iron. 



The right hand figure shows the primitive rhomboidal 

 termination of an elongated crystal, with a decrement upon 

 the obtuse solid angle. The face produced by this decre- 

 ment gives for its incidence upon the rhomboidal face 149° 

 ©r thereabouts : this modification seems to be new_, as Haiiy 

 has not mentioned it. 



The left hand figure represents another view of the pri- 

 mitive, with a decrement on the acute angle, which agrees 

 with letter s of Hauy'sj%. 137- 



