GLACIAL PHENOMENA IN MAINE. 131 
character of the rocks and the lay of the land, 
they are less distinct. As, however, the ex¬ 
tent over which the same set of phenomena 
may be traced forms an important part of the 
inquiry, I may indicate a few other points at 
which similar appearances occur. On the sum¬ 
mit of the hill half-way between Brownville 
and Milo, near the Sebec River, the scratches 
and furrows are distinctly seen trending due 
north and south. They recur, after crossing 
the ferry, on the brow of another hill farther 
to the south. Between Orneville and North 
Bradford there are extensive flats, on which 
the rocks, wherever they are not decomposed, 
exhibit even and polished surfaces traversed by 
rectilinear grooves and furrows trending main¬ 
ly from north to south, though here and there 
diverging to the west, and even forming occa¬ 
sionally an angle of from twenty to twenty-five 
degrees with the main set of lines. Farther 
south, as the land begins to rise again, all the 
marks point once more uniformly northward. 
To the north and south of the town of Hudson, 
and especially near the post-office, the scratches 
are very distinct, bearing due north across 
slaty rocks, which trend east-northeast. The 
