■* 



4«. 



« ^* 





^ 270 ON THE MINERALOGY^ !-^ , \ ^' Jl 



'v *^ • -v *■•*'■, . 



ifc *»^- 6. Capillary. Near Sergvarsoit in Disko, there is a 



j/i ^ small cave covered with capillary mesotype, which 



'^' the Greenlanders consider as the hair of one of 



., "r. their magicians called Angekok. When this va- 



riety is decomposed, it forms the earthy or mealy -■. 

 # ^4^ zeolite. ^^ ^ 



2. Slilbile, — in thin hexagonal tables. 

 b. In quadrangular prisms, acuminated by truncated py- ^ %^ 



ramids. 



3. Chabasie, — crystallised in the primitive rhomb. > 



b. In truncated rhombs. 



c. In macles. * 



4. Jnalcime, — ^crystallised in the form of the leucite. 



^ 5. Compact Zeolite, white and red. — This mineral occurs in 



"*4^ cavities and veins in all the rocks of the floetz-trap £Uk^ 

 ;. ^mation, except the basalt-tuff. *, jr v. 



^ 6. Apophyllite or Ichthyophthalme, occurs, * ■^"^ 



.n.,_ a. In prisms perfectly rectangular. 



^ *^ b. Also with the solid angles replaced. This variety 



was mistaken for mesotype, and described as Meso- 

 i^'" type epointe. ^ 



c. By a curious arrangement of the particles, the crystals* * 

 of apophyllite are sometimes cylindrical, and being 

 contracted at the extremities, present the shape of a 

 barrel *. They also occur acuminated and diverging, 

 ^ *S. -wJMI sometimes in the form of a rose. In perfect cubes, J a 



the apophyllite occurs in Greenland only in the ba- 

 salt-tuff, accompanied with delicate capillary meso- 

 type. 



«4 ^ ^**.' 



M 



* The cylindrical Apophyllite, according to the experiments of Dr Brewsteb,^. ^ 

 who has* examined some specimens which I transmitted to him, differs in a re- 

 markable manner from the Apophyllite of Iceland, Faroe, Uto, and Fassa. ItsP- ^^T 

 optical properties he has found to be of a very curious kind. ■'" "- "^ ' 



