328 Mr. T. S. Hunt's ExamiiUiiions of some Canadian Minerals. 



*'5^-i Silica. .v\'>v^saS^^)V4 ^j-^^^^^ivgo "O .ILIZ 

 Magnesia '^y:''lP .M.V,V\. 43-53 

 Peroxide^ii^ou^^ ,^^^^.^^ -80 

 Water IS-iO ,, 



■^1 i'' ■■ * I ill i Hi 

 iqorf I ififl J .JtiJii-ioquiJ 08 8aoiiiiVi38do a'i'jIalOQ^a/'. W/ilHT T 



These specimens, althougli tlie latter differ somewhat from 

 the others in specific gravity, are nearly identical in composition 

 with each other and with the marmolite of Hermann, but differ 

 from that in not bc^ng foliated. The proportion of water which 

 they contain is intermediate between that of serpentine ^nd of 

 the Deweylite of Emmons, from which latter they are separated 

 by their higher specific gravity. Dana has, however, in conside- 

 ration of the wide latitude presented- in the composition of this 

 class of minerals, nnited marmolite with serpentine, and it would 

 not we think be advisable to retain retinalite, which.,}^ iPi^ly, a 

 compact marmohtc, as a distinct species., , :,i;,('\ii | ,i,|,ii: ,,.■ 



The presence of traces of alkali has not hitherto been generally 

 recognised in this class of minerals, but; Ficinus has observed 

 from '50 to I "33 per cent, of soda in the dermatine of Breithaupt, 

 and Schmidt 1"98 per cent, in an asbestiform serpentine from 

 ;Zoblitzfi'. , ■,,,-,.., ■ ,, 



nji;jZtVco».'-v^This species is found in, considerable abundanee ^t 

 Gresnville, associated with tabular spar, qalcrspar, sphene, py- 

 roxene and plumbago. The crystals are often half an inch in 

 diameter and an inch or more in length, with finely ntiodified 

 terminations. Specific gravity 4-602-4'()25 ; colour brpwijish 

 red, passing into fieshri;«d.wd ch^J^iryr^'f-d,.// rljs,anftlysi? a^Foi;"!^^ 



io -^Jr.iTtool'j Silica ;..!7Kjifi onielyi-wfi u?3^"^iz'j IliJa ih'idu 

 avjuf I Htiiliiw- Zirconijtu[jto-i-Mf« .fI-)>d//.idiJ oI^^<ft imih ^liis adt 

 itasrf ovKil I .Oiar -ii'-o-i orfj 'lo l-ffiq is'tit '^^KOi'inb bovjasdo 

 im fo'itrroo o+ ')rr'»» ■jv.m iWubr ^mhv.■|■v^^(U^ im hul) o\ -Mmu 

 b o/f^Thc zirconia contained a trace of oxide of ironji^hidS wa3 not 

 ^'Separated. ! ' ;, 



There are still among the known minerals of the province, 

 some imperfectly described species which I purpose to examine, 

 and my results may probably form the subject of another com- 

 munication. . :i,: ^ !!..;■, i(! /•():, ,:;.j:; j, ;..,);/. 

 "".Montreal, Feb. 7, ]851iJ"«'h 'itb ai eaiJrifilngoTii'gii gnmimTOJ 

 '"JJ'-'' ■ -f ,ii jKifiS oifj Joir f.i tiyfMtjiff/.holmi ; bsJaot 



Ji '{IjiioupDguoU ,;i.)..' tvA (\-Ahyr: ijljju;> dauiv/ miiib f^aidioa 

 '{nahtoala orii ui pnofoifob oAi xadJridw am lo bsTjacmab oA j»m 

 tWuM j{jOS.[o*flI) .v/ife«i«'!I .iMoi i9li)iwQ Mmm'i-ioWil n Io nmn'A * 



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