Geology and Mineralogy. 71 



filling cavities between the granite and serpentine near others of 



the vermiculife utou|>; Si in on a i;i»i n i: — t In- so-called ehrvsopra- 

 serdefrom Glaserndorf, Silesia. (Syst. Min., 5tli < d.. p. -Hi), II. O 

 =21-03, not 31-03). Schrauf uses the name Paeachloritk lor 

 these substances whose constitution can be expressed by the gen- 

 eral formula MAI.SiO ) + /-( J{ Si( ),\+p :u\ ; also, Piioto.hi.o- 

 .-.i. I.., .I,.,, ,oi„,p„mlino tu; W (Al 1 SiO,) + n(R 1 Si0 4 ) + />aq.- 



MoLv'ni.oMKNn'i-:, Yoiui.tomknitk. --The remarkable copper 

 selenite from Cacheuta, Argentine Republic, called chalcomeiiite 



h, IKmIoi/ ia imlDunimiJiislHUMhs.ul.Hlii, tin- .Journal 



two others from the same locality, a lead selenite and a cobalt 



selenite. The first, h»n(>jf,0. ,,« <>■>■ ( i»\vfi6oS lead, and HV V V 



varieties have a greenish color and contain a little copper. The 



