FLO KS GTN ATED VALED VORA DATA 
structure, the sharp boundary between the two rocks, the irreg- 
ular thinning and thickening along the length of the inclusions, 
all point to this belief. Here and there, within their boundaries, 
obscure apophysal extensions of the coarser rock may be 
observed. But this conclusion reaches practical certainty when 
the molar contact of the porphyritic granite and the ‘“ Lake 
Winnipiseogee gneiss”’ is studied. The latter is seen to be pre- 
cisely the same coarse-grained biotite-gneiss as that in the 
inclusions, except for certain differences which can be explained 
as due to exomorphic change wrought by the porphyritic 
granite. Apophyses of the latter may be seen at the neck or 
isthmus of the peninsula cutting the gneiss. An important rela- 
tion subsists between this line and the arrangement of horses on 
the hill. Not only are they parallel to one another, but they lie 
parallel to the line of molar contact. 
Transition zone at Centre Harbor.—At Centre Harbor the 
gneiss lies on the east side of the boundary and at some dis- 
tance from it is the usual coarse-grained muscovite-biotite 
rock of the Lake Winnipiseogee gneiss terrane. Its foliation 
planes strike N. 15° W., and the dip is about 60° easterly. As 
one approaches undoubted porphyritic granite through a dis- 
tance of fifteen feet from the contact, one notes the large ortho- 
clase and microcline feldspars two inches long, which normally 
are confined to the porphyritic granite, now scattered through 
the finer-grained rock with their longer axis parallel to its 
schistosity. They grow more numerous as the porphyritic 
granite is neared, until finally some four or five yards from their 
first appearance, the outcropping rock is typical porphyritic 
granite. It possesses the same strike and dip as the gneiss, 
being well foliated. There is thus a complete and slow gradua- 
tion of the one terrane into the other, making it impossible to 
draw any line between them. 
Transition zone near New Hampton Station—A similar zone 
of transition between these two terranes occurs a mile and a 
quarter from New Hampton Station on the road running south- 
east from the station. The zone of passage is here much wider 
