TABLES 



CRYSTALLINE FORMS INTRODUCED INTO THE DESCRIPTIVE PART OF THIS WORK. 



WITH THE MEASUREMENTS OF THEIR SEVERAL ANGLES. 



[The figures in the tables correspond to those in the body of the work.] 



SULPHUR. Figs. 14 and 15. Page 181. 



Fig. 14. The primary, an octahedron with 

 a rhombicbase. 

 P on P .. 106°38' and 84° 58' 

 P onP' .. 144 17 [Beudant); 

 143 7 48 {Haiiy). 

 P on ?• .. 108 26 6 {Hau;/). 



GRAPHITE. Fig. 16. Page 180. 



Six-sided tables cleaveable into rhombs in 

 the direction of the dotted hnes. 



GLAUBER'S SALT. Figs. 17 and 18. Page 19G. 



Fig. 17. The primary, an obhque rhombic 

 prism. 



M onM' 99° 36'; 



or, according to Haiiy, an octahedron 

 with a rhombic base. Fig. 18. 



NATRON. Figs. 10 and 20. Page 107. 



Fig. 20. The primary, according to Haiiy. 



P onP 143° 8' 



P onP' 113 54 



NATRON. 



Fig. 19. A secondary form from solution. 

 P on 140°46' 



COMMON SALT. Figs. 21 and 23. Page 198. 



Fig. 21. The primary, a cube. 



Fig. 22. A hollow quadrangular pyramid 



formed by the slow evaporation of a 



solution of common salt. 



SULPHATE OF POTASH, 

 elusive. Page 201. 



Figs. 23 to 25 in- 



Fig. 23. The primarj', a right rhombic 



prism. 

 M on M' .. 118° 8' {Beudant.) 

 Figs. 24 and 25, other forms of sulphate 



of potash. 



ALUM. Figs. 26 to 28 inclusive. Page 202. 



Fig. 26. The primary a regular octahe- 

 dron. 



Figs. 27 and 28, modifications of the 

 primary. 



