98 PHYSIOGRAPHY. 



FEIIGUSONITE. 

 ORE. 



Fergusonite. HAIDINGER. Trans. Rov. Soc. Edinb. 

 Vol. X. Part 2d, p. 271. Allanite (in part). PHILL. 

 p. 264. 



Pyramidal. Fundamental form. Isosceles four- 

 sided pyramid. P = 100 28', 128 27'. Vol.1. 

 Fig. 8. AP. 



Simple forms. P oo (t); P (*); 



angle at the base = 159 % 



Char, of Comb. Henri-pyramidal, with parallel faces. 

 Combinations. 1. P oo. KL_^!3. 



g. p oo. P. KL+-??)!]. Fig. 110. 



3. P-o, P. SLS.% KL+^1 Fig. 193. 



Cleavage, traces parallel to P. Fracture perfect 

 conchoidal. Surface rather uneven. 



Lustre imperfect metallic, inclining to resinous. 

 Colour dark brownish-black, in thin splinters 

 pale. Streak very pale brown, like peritomous 

 Titanium-ore. Opake, in thin splinters translu- 

 cent. 



Brittle. Hardness = 5-5 ... 6-0. Sp. Gr. = 5-838, 

 ALLAN ; =r 5-800, TURNER. Not magnetic. 



It loses its colour before the blowpipe, and becomes pale 

 greenish-yellow, but is alone infusible. It is entirely 



