PECxMATITE DIKES CONTAINING RARE MINERALS. 327 



garnet, and nniscovite. The three localities last mentioned lie in a line, 

 trending about N. 70° W., and may be parts of one vein. 



A new locality discovered !)y me is in a pegmatite ledge a mile south 

 of tlie Barrus ledge and overlooking Lilj' Pond. Here prismatic pseudo- 

 morplis of coarse muscovite after spodumene, 2 niches long, occur in liniite(l 

 number. 



III. DIKES IN CHESTKR, ULANDFORD, AND HUNTINCHON. 



The locality mentioned by E. Emmons^ as occurring a, mile north of 

 Chester village was stated by him to contain spodumene, smoky quartz, 

 muscovite, cleavelandite, and indicolite. This ledge I was not able to 

 find. Mr. A. A. Julien seems to have had better success, but to have 

 found no spodumene there.^ Not far from this locality the granite veins 

 have furnished large and perfect mauganesian garnets. 



Farther south, on the northeast line of Blandford, a very coarse peg- 

 matite, much quarried for mica, quartz, and feldspar, the property of the 

 Pontoosic Flint Mills (see page 322), has furnished beryls of great size, 

 the largest as big as a powder keg, with large garnets. A granite in the 

 churchj^ard in Blandford also carries beiyl. .Just south of tlie first house 

 on the Westfield-Russell road after entering Russell tlie pegmatite abounds 

 in manganesian garnets of large size and great perfection, which are found 

 in every cabinet. 



IV. DIKES EAST OF THE CONNECTICUT. 



On the other side of the area the small pegmatite veins at the Monson 

 quarry have furnished very fine beryls and many manganesian ganiets. 

 The finest bluish-white cleavelandite occurs in New Salem. In Northfield, 

 where the Gulf road crosses the south line, large beryls occur in the peg- 

 matite, and farther north, a mile west of the Moody homestead, is the inter- 

 esting locality of columbite in a pegmatite vein in the mica-schists, and a 

 mile north on the strike of the schists is a secondary vein of the fine 

 radiate-foliate cleavelandite of very considerable size, exactly like the 

 Goshen-Chesterfield schists, in which I could find no other minerals. 

 Still farther north, on the strike and therefore in the same schists, is a 



'Am. Jour. Soi., Ist series, Vol. VIII, 1824, p. 243. 



^A. A. Julien, Spodumene and its alterations: Annals X. Y. Acad. Sci., Vol. I, p. 221. 



