Q. J. G. S. vol. xlvii.] 



[To face. XX 4C>(j. 



I. and II. 



vn. 

 vin. 



XI. 



xn. 





I. 



II. 



III. 



IV. 



V. 



VI. 



VIT. 



VIII. 



IX. 



X. 



XI. 



XII. 



XIII. 



SiO„ 



38-8n 

 2-95 



oas 



1-8B 



504 



0-28 



trace 



3tr,i 



trace 



38-58 



3-00 



0-08 



1-95 



5-10 



0-30 



trace 



34-32 



trace 



40-40 

 0-G5 



38-29 



38-60 

 1-02 



4-fi6 

 3-31 

 0-59 

 1-97 

 36-40 



0-41 



38-60 

 0-10 



■ 11-55 



trace 

 33-02 



3-31 

 12-82 



100-00 

 2-65 



37-15 

 5-60 



( 1-10 

 l 8-80 



0-10 

 32-80 



0-29 



■ 13-70 

 0-46 



100-00 

 2-56 



39-50 

 5-08 



. 8-12 



trace 

 34-65 



0-10 



12-00 

 0-56 



100-00 



43-35 

 4-08 



10-74 



1-51 

 28-43 



1-.35 



8-69 

 1-85 



100-00 



41-43 

 7-29 



1 7-87 

 ( 0-87 



1-88 

 32-73 



[ 7-93 



42-89 

 0-76 



6-30 

 3-83 



40-29 

 5-10 



4-94 

 3-98 



11-85 

 25-67 



8-17 



58-90 

 3-99 



2-32 

 3-76 



26-80 

 2-91 



Al.,0, 



Cr.fl, 



FcOa 



FoO 



7-47 

 0-15 



13-50 



NiO 



OaO 





MgO 



37-43 



34-24 



38-09 

 7-98 



MnO 



FeS^ 



Na^O 



077 

 0-33 



I 15-62 



0-76 

 0-30 



15-52 







Kfi 





12 09 





H^O lost on ignition ... 



HjO lost at 100° 



Insoluble in HCl 



13-90 



12-35 

 1-37 













Total 



100-30 



90-97 



100-00 



93-12 



100-58 

 2-587 



100-00 



99-85 

 2-85 



100-00 



98-68 





Sp.gr 



2-5 



3 



2-545 



2-644 



2-74 



2-77 









°™rn™^ aTp:^^^^^^^^^ ;^^^;n^sing i.perlect crystals [TM. a„al,.s .a, be ta.en as repre- 



Mag. 1871, (4) Tol. xli. p. 101. " 8erpenime.j (ut the water, 2-06 was lost m the water bath.) Analysis by J. A. Phillips Phil 



dried at 100» h. The H,0 includes tracesorCO,; l^uS s of Sbln-icPacrd ^ '" r^'*"!' f '"*"'" '■''"' ^'°= '™'"*» *--^ "^ ^iO, The rock was 

 paper on serpentine of the Lizard district, by Prof. Bonney. Quart, /oum. Qeol sic voT ^ a8?7r"%r,^''^^''' ^^ ^'- H"dleston. in Appendi. to 

 Greyish green granular serpentine. PorthaUa. ' ' ' '•^°"-' P- "'=•'- 



Dark oil-green serpentine. Porthalk. ~| 



Beddish brown granular serpentine. PorthaUa. I "'^llfi'ls'i^S: ^ZttS^^^^ 



""""is aWs? IT^ZZtT^"- C^^'^' ^ '^™^' -""^'^^ ^''"^"^ ™ ^'"■''™='> ^P-™-. fo"- -idenuy it J f^Tp. Z^^'' ""'"'■ ^'°'- ^'"^ ™'- ^'■ 

 ^'T^^i!ZT^:r,7^^,';!?£- «eoaeo..Mag.(I887)pp.69,I37,380. By Mr. M.W. Triers, of University College. London. A partial analysis is 

 Gew Graze. Bed serpentine, minutely gi-anular in texture. Described in Quart. Journ. Geol. Soc. ™1. xxxiii. (1877) „ 918 Pv f1 

 Quarry near Lower Pred.-innack. Reddish serpentine with numerom ,.r,«f„l= „f 1 -t i, ui , =""- ^o^') P- J18. By the same. 



T. G. B.] Described ,n Quart, Journ. GeTsZ vTxLm.ir877Tr918 anttl.tS'J^SSS)^^^^^^^^ "'-^1' ^ ^"^ "ever seen any felspar.- 



From a weathered portion of the same hand-specimen. By the same. °""'' 





SiO, 



AI.O,, 



MgO 



28-83 

 30-57 



H,0 



1937 

 18-46 



Total. 



From the -vein at Kynance ... 



42-47 

 42-10 



6-65 

 7-67 







From the vein at Gew Graze 



— ■ 



97-32 

 98-80 



