362 J. D. Dana on the Quartzite, Limestone, etc., 
72. Erroneously given in P ue as oe. 1, which line does not reverse, or at least 
was never seen reversed at She 
100, The prin cipal i oa = the 8 spedird wl od the corona. The corresponding lin 
spectru eeble, a te ral occasions when the neighbor 
ing sine - icp, n (1463, & ke.) ag: een greatly disturbed, this has wholly failed to 
sympa nce I have marked the Fe with a?. Watts indicates a strong line 
of ony Lat sa 315 
aoe Observed only on aed day, but verified by Prof. Emerson. 
172. “Called ‘little a by Mr. Sto 
119. Given by Lockyer as K 2054. Its position is a little uncertain; it seems 
to coincide with a of the dark lines at 2051 and 2054, but Ties between them, 
a little nearer 
ther a ia than a line 
222, The position of this “ine, which, however, like 189, is rather a band, w 
determined by two series of ¢: metrical measurements. It was di wie 
ered by Rayel in J anuary, 1869; ‘se “called ' f’ by car ge 
272 and 273. These lines were both reversed (by a w bright stripe running 
down the Koma! of the broad hazy band) as constantly, whenavel the seeing ba: 
or © = If The observation was cult, however, and required the 
ost soialie exclusion of foreign light, and a careful adjustment of the slit in 
the plane of the hia image formed by these parti rays. 
d to be regularly Savéreed ice the non ze the sun itself, 
‘in the penumbra and immediate neighborhood of every important spot 
Arr. XLIL—On the Quartzite, Limestone and associated rocks of 
the vicinity of Great Barrington, Berkshire Co., Mass. ; by 
James D, Dana. With a map, on Plate IV. 
WHATEVER the a ces at Canaan,* the quartzite in 
Great Barrington (or Barrington, as it is called in the guide- 
books), a dozen miles north of Canaan, alternates with es 
schist, and both of these rocks for the most part overlie the * Stock- 
schist, to a great extent a newer rock; and as both occur A 
‘some places interstratified with upper — of the limestone, 
are parts of one consecutive series of stra like 
If then the western range of eae in Berkshire is, ae 
that of West Rutland, Chazyt in age, the range to the eastw 
* See, on the “ Canaan Quartzi ve hemes: tier Ii, oh 179. Ishall at a ee 
‘time reconsider the conclusion in that paper with regard to the relations post od 
autite to the other rocks; it was based on general connicieraiien and 0) 
This rela poogerages gneiss and quartzite was observed by Prof. Hitchcock, 
sy is stated in his Massachusetts Geological p. 588-590, 1841), wot 
he says that the quartzite might be considered a member of the gneiss and m 
formation. Its relation i i of, on 
“an ph nem = Pninge 
rane 
