Transactions of the 



HYDROUS SILICATES- Continued. 



Name. 



182 I 



Mesotype (Natrolite) 



Do. (Lehuntite) . . 

 Thomsonite 



Pliillii^site. Lining \ 

 amygdaloid cavities J 



Chlorite. In 8 liedra, ', 

 pseudomoiphous f 

 after Eed Oxide of I 

 Copper . . . . / 



Green Earth (a vari- \ 

 ety of Chlorite) j 



Agalniatolite . . 



Talc (Nacrite) . . . . 



Do. With Fluor and i 

 Apatite . . . . j 



Do. In Schist 

 Cerite (doubtful) 

 ChrysocoUa . . 



Smitlisonite . . 

 Prehnite 



Gmelinite 



Chabasie 



Serpentine 



Do. WithCalcite .. 



Brewsterite. Oblique '| 

 Prisms in Calcite j 



FOKMULA. 



Harmotone 



Do. Twin crystals in ' 



Calcite and Galena , 



Steatite 



]SraO,2HO+Al2 03, 

 3 Si02 



.3 (CaO, Si02 + 

 3 (AI2 O3. SiOo )+ 



7 HO 

 E*0,Si02 +AI2 O3, j 

 SiO. +5 HO. *ll 

 =Na, K, Ca ) 



Si02— AlsO.-!— \ 



FeO— MgO— HO / 



MgO, 2 SiOs + HO 



2 CeO, SiOs + 2 HO 

 CuO, SiOo + 2 HO 



2 ZnO, Si02 + HO 

 ( 2 (CaO,Si02 + I 

 \ AI2 O3 Si02 4- HO j 

 I NaO,Si02 4-AI3 O3, ) 

 \ Si02 + 6 HO i 



f CaO,Si62 +AI3 O3 I 

 ( 3 SiOo + 6 HO ) 



3 MgO, 2 Si02 + 2 HO 



K*0, 2 SiOo 4- ) 

 Al» O3 3 SiOo + 



5 HO R=Sr, Br, Ca ) 

 BaO, 2 SiOo + t 



AI2O3, 3Si02 +5 HO / 



Locality. 



Giant's Causeway 



( Hohentwicil in Hiigau 

 \ Wurtemberg 

 Salough Crags, Antrim 



f Kilpatrick, near 

 \ Dumbarton 



( Isle of Jlagee, County 

 ( Antrim 



Cornwall 



Yerona 



China 



County \Yicklow 



St. Austell 



Brazil 



Shetland 



Cornwall 



Siberia 



Nr. Eouskear,Coi-nwall 



Scotland 



County Antrim 

 Germany 



Glencoe 



Bohemia 



Puster Thai, TjtoI 



Baireutli 



Cornwall 



Portsoy, Banffshire 



Elba 



Strontian, ArgyUsliire 



Andreasberg, Harz 



