



INTRODUCTION. 



C Without any distinguishable parts, or the ap- 

 < pearance of being composed of smaller 

 C parts. Examples, Chalcedony, Flint, c. 



\ When composed of very minute, almost invi- 



) sible, rough parts, as clay, marl, &c. 

 I 



r 



\ When composed of small shapeless grains, as 



\ S ranu ^ atec ^ quartz, sandstone, &c. 



f When composed of small spherical bodies, as 

 Globuliformis \ the pisolithus and oolithus. 

 Fibrous ( When composed of fibres. Examples, Fibrous 



Compact 

 Compacta 



Dicht 



Erdig 



Granular 

 p , 



Korni 

 Globuliform 



Ftbrosa 



Faserig 

 Fine 

 Coarse 

 Long 

 Short 

 Straight 

 Crooked 



< gypsum and amianthus. 

 ' The fibres may be 



Tenuibus 

 Crassis 

 Longis 

 Brevibus 

 Rectis 

 Curvatis 



When composed of long, narrow, flattish la- 

 mellae. This differs from the fibrous by the 

 parts being broader. Examples, grey anti- 

 mony, manganese, zeolite, actynolite, &c. 

 This admits of the same variations as the 

 preceding. 



When composed of smooth continued leaves or 

 plates, covering one another. Example, as 

 the spars. They may be 

 Straight, Rectis, as in most spars ; or 

 Crooked, Curvatis, as in Schiefer spar > or 

 Spherical, Spharicis, as the mica hemisphaerica 5 

 Undulating, Undulatis, as in talc 



Messrs. Wiedenman and Estner, there is an article under which several cha- 

 racters of the texture are given. Some of these I have arranged under this 

 article; others, under that of structure or compound texture. In Mr. Werner's 

 ewn work on the outward characters, this article does not exist." 



Radiated 

 Radiata 



Lamellar 

 Lamellosa 



