342 Tli<' Annrinlll (irahxj'ixl . l)..r,nl..T, ISIIO 
31r. 1. -M. liucll. The liill on which the sUitc eupitul is built Ito- 
longs to lliis chiss, as shown l)y llie section of its artesian well.^ 
Its higlit is alxnit 80 feet above the adjoining lakes, and the sec- 
tion passes through till for the first 8 feet, and through sand and 
gravel, enclosing occasional boulders, for the next 72 feet. 
Gc<njn(j)hi.c /)isfriltiiti(>ii. — (Jenerally throughout drift-bearing 
areas the till, excepting where it is accumulated in the hills and 
knolls of the terminal moraines, has a comparatively low and 
level or moderately undulating surface. But on certain tracts a 
large part of the till is exceptionally amassed in the drumlins, 
which stand uj) very conspicuously as high hills, sometimes oc- 
curring plentifully with irregular arrangement in groups or belts 
which may extend 20 to oO miles or more and often have their 
greatest length in parallelism with the course of the terminal mo- 
raines. Elsewhere drumlins are sparingly scattered here and 
therewith intervals of several miles between them, this being often 
observed on the b(n'ders of their tracts of greatest abundance; and 
rarely a single typical drumlin, as Pigeon hill on Cape Ann, may l)e 
separated many miles from any other like accumulation of till. 
It would l)e expected that the al>undance or absence of drum- 
lins must l»e determined, or at least influenced, by the varying 
contour and diversity in lithologic characters of the bed rocks; 
but I have l)een unal)le to discover this relation or dependence, if 
any exists. In southern New Hampshire, and southward to the 
neighborhood of Boston, the drumlins are finely developed on 
some portions of the low land near the coast, being spread over 
areas which would otherwise be nearly level: but at many places 
inland they are equal h' abundant among high irregular hills of 
rock. They seem as likelj' to be found on one side as another of 
any mountain or prominent hill range; and the altitudes at which 
they occur vary from the level of the sea to 1,500 feet above? it 
on the hight of land Ijetween the Merrimack and Connecticut 
i-ivers. Interspersed with the tracts of plentiful drumlins are 
other tracts which have none. If their distribution has been 
mainly independent of the ditferences in topography and the 
limits of various rock formations, as seems to be true, we are 
brought to the alternative that it probably resulted from move- 
ments of the i<'e-sheet and the conditions of its erosion, trans- 
l)ortation, and deposition of the drift. 
"■•'(Teolo^y of \\'is('(>nsin, vol. ir. 1S77. |). ">0. 
