208 Tenth Supplement to Dana's Mineralogy. 



Chlorite [p. 294, IV. V-VIIT,].— Genth has described a chlorite-likt 

 1 from Web-iter, N". C, which he considers a result of the alteration of chry 



es slightly and becomes silver-white. Infusible. ° The material for analys 

 Si 3tl ^er Fe Ni % Ca K Jgn. 



[lepard's rastolyte, from Monroe, N"ew'York, is shown \ 



M98 2188 2844 6-24 9-22 = 100-76 



All the iron was in the state of protoxyd. A former analysis by Shepard made 

 the composition near that of stilpnomelane (see Suppl. IV); but tliis analysis '* un- 

 doubtedly incorrect, as Pisani has proved that the mineral is only partially decom- 

 posed by acid, so that results obtained from an attempted decomposition by acid^ 



cludinsj the iron and alumina, as foreign'to the mineraC we'have Si 30-59, C" ^'^^^f' 

 H 26 58 or Cu Si+sS. Other analyses are given of substances -which do not 

 appear to be definite compounds. 



Chetsolite [p. 184, I-IV. VI].-F. A. Genth has analyzed two ^arietiMof 

 chrysolite, occurring in talc-slate, at Webster, Jackson Co., N. Carolina: 1. P?^ 

 grayish-green, granular and very friable, G=3-28 (12° 0)-, 2, less friable, of darW^ 

 yellowish olive-green color, G.=32-52. 



Si te m Sfg 6a Chrome-iron Ign. 



1. 41-89 7-39 0-35 4913 006 058 082=100-21 



2:[t]%-U ?-26 39 4^8 002 iS 0-?6=100-18 



with traces of alumina, oxyds, of cobalt and manganese, associated with chrome- ^ 



opinion, that the specimens give evidence tlfaT dirysoiite is probably the m\oe^ 

 from which talc-slate, and many of the serpentines have been formed-(thi3 Joi^niu, 

 [2].xxxiii.l99). "^ . ,•„ see 



For analysis of altered olivine from Ihringen, in Breisgau, by Lewinstein, 

 Kopp, Jahresbericht, 1860, 757. 



CuNocHLORE [p. 293, 1. II, V-IX].-Analysis of cUnochUre from Achmatowst, 



. Min. RuBslands, iii, 2S6, in Kopp's Jahretbericht, ] 



