a. II. William* — CelestUe from West Virginia, 1 S T 



Celestite Crystals from Mineral Co., West Virginia. 



Fig. 1.— Combination showing the forms x> Pi (144); a, oo Poo (100); c, OP 



(001); d. |Poo (102): o, Px> (011). Miller's position. 

 Pig. 2. — Same, turned 90° about the vertical axis into the position assumed by 



von Lang for auglesite. This is so much more advantageous for showing 



the forms of these crystals that it is retained in all the other figures. 

 Fig. 3. — Exceptional combination of x, a an d c. 

 Fig. 4.— Ditto of x, c and d. 

 Fig. 5. — Parallel growth of two individuals. 

 Fig. 6. — Crystal showing only the form #, which is almost lenticular from the 



curvature of its plan 

 Fig. 7. — Distorted form, with x* a > aQ d a rounded surface corresponding to o. 

 Fig. 8. — Crystal bounded by x an( l c > with a conically rounded surface in place 



of o. 

 Figs. 9, 10 and 11. — Crystal groups showing growth forms and surface markings. 



