Tenth Supplement to Danas Mineralogy. 



one direction. H.=2-a. Translucent to opaque; lustre, vitreous to dull. The 

 in chlorhydric acid . Analysis by Delffs : 



^vingthe formula %=* Is + 152:=% 13 80, Is 39.65, fi 46-55 = 100 0O.-/flW 

 ScHEKLiTE [p. 317, VIII].-Analysis of a very pure variety from Traveraella,by 



% SiD Ni Ca Cbrome-iron. Ign. 

 38 62 tr. 0-27 0-02 57 955 = 100-88 



the change of chrysolite into talc or serpentine, a portion 

 at the principal serpentine 



1 separates as brucite. 



Somerville, New York {ZeiUchrift fur Chemieund Fha^-macie, 1860. iii', 15). 



SexangulUe.-See Galena. 



Spiautrite.—See Wubtzite. 

 Mi^e''Geotei'^\hyc7«' f ' ^^"''^ ^^ an.alyzed the auiomolite from the CanjJJ 

 posittln'^'''''''''^^'''^'"^' ^"^^ ^odec'Iihedraf plares,'^th?ktterdeTply^UiateT Com- 



2I7 r2. .f.. fL ^' 2" *" *^ 



^37 123 63-37 6 68 301 30-27 0-20 8 22 = 100-35 



(This Journal, [2], xxxiii, 196.) 



Sla»s/urthite.~S*:e Boeacite. 



natlonT^RaimeUb^r"^-''"^'"^ s^pecies has been subjected to a critical reefflO* 



terimvTncn?n°J!^.fr ^° ^VVl- SpecimenVfromX same Jocality%nrit:d J»- 

 xeriaiiy m composition. The following varieties were examined:—!. From M"'™ 

 ^luseits ; occurs m black and brownish-black crystals, rhombic prisms of 129° ^^^• 



Rammelsberg, is possibly identical -with margarodite or damourite. 'Ramnielsb«rS 



