T. S. Hunt—No\ 



mtruMve rock. One of tlle^t \un-iu ii~->i '1' i i i- i i ^i' 

 eter of about an inch aiidci hall iml i i' n - nudti n m 

 la\erof \ellowish erystalhnc hl.Uji'i i "nt < i I mtli <>' 

 nich m thickne'-s, which mchulc- h>iu piiu- ol a ik hn \ 

 mica The^e penetrate the centnl poition ct th^ < m ^\ iii< i 

 a bioadh ciTbtaUine bluish orthoclase eiu lf)-ni<: -nnll p<u,i. i 



i^h and less coaKselv crv^tdlline tehlhpii with ir- h(oiiiimii\ m 

 mica, had e\ idently lined the walls of tin \ * in w ml' tin . u 

 ter vet remained open, and had moreo\(i ui til b l^i' ^ ' -i" ' 

 lateral branch. The same conditions aic -u n m tlu liUni.^ < 

 other veins in this vicinity, which aic oiti m inu( h 1 lun in 

 present upon their walls bands of an im h .>i r > <-! th^ \ . .^>^' 

 ish feldspar with mica. 



The successive filling of a graiutu mm — ' 1 i "^ < " ' 

 shown in a spe3imen from Sherbrookt >,o\ i ^( <>ii i ^ ln' ' 

 owe to the kindness of Prof. H. y Hiiid 1 i< \ w. x < • 

 ^een to be transverse to the adherent i\m _m i 1 ihk - 'i ~ 

 has a breadth of nearly four inches about t ^ >> I'm - -i ^\ j " '^ 

 symmetrical, and is included betw e( n t\\ o 1 1 \ * i - i >< 1 1 -. n h i 

 to the walls, consisting of a finegiaintd luixtuit <>1 ^\ll u U > 

 spar and quartz, each about one fourth oi m nu h tlii' k u 

 marked by subordinate zones, more oi les^ quailzo^t \\ itli] 

 these two"'bands is a coarser aggiegite, consisting of two ii.h 

 spars, with some quartz and muscovite, plates of which ai 

 crystals of pink orthoclase penetrate an irregular la%er 

 smoky quartz varying from one eighth to one half in inch 

 diameter. This fills the center of the symmetrical ])ortion 

 ^he vein, on one side of which is the mica schi.t. while the oth 



