320 



APPENDIX. 



BLACK TELLURIUM. (See Vol. I. p. 68.) 



Analysis, by BERTHIER, of a variety from Nagyag. Sp. gr. =6-84. 



Gold 6-70 



Tellurium 13 00 



Lead . . . . . . . 63-10 



Antimony 4-50 



Copper 1-00 



Sulphur 11-70 



BOTRYOGENE. (See Vol. I. p. 82.) 



Secondary form. 



Fig. 497. 



\ 



M on M - 119 56' 



s on 8 1 11 00 



The above figure does not perfectly represent the crystals of Botry- 

 ogene, inasmuch as face r does not exist, and the acute lateral edges are 

 bevelled, the bevelling faces meeting under 81 44'. The lateral planes 

 striated vertically, and less perfect^ formed, than the terminal planes. 



BUCKLANDITE. D y s t o m e A u g i t e- S p a r. 

 HAIDINGER. (See Vol. I. p. 93.) 



Sp. gr. = 3-945. ROSE; brilliant crystals in the lava of Lacher-See. 

 1. It is completely soluble in muriatic acid. 



CARBONATE OF CERIUM. 



In thin, four sided crystalline plates of a greyish-white color, and in 

 coatings on Cetite, It does not change its appearance, though it loses 



