Barton.] 24 [Nov. i6, 
country ;is siiiLijle individuals, witli occasional groM])s of two or 
thr*ee lying side ))y side, but each one of the group being a 
definite, well-formed drunilin. In another area they occur in 
large irregular masses more or less sculptured into <lrumloid 
forms. 
Their distribution, as related to elevation above the sea, has a 
wide range, tiieir bases resting on the one hand below sea-level, 
on the other at an elevation at least eleven hundred feet above 
the sea. 
The influence of the original topography seems small as they 
are distributed alike over comparatively level plains and over 
highly broken areas. In certain areas the present topograj)hy is 
entirely controlled by their undulating outlines, in others so little 
as to have no noticeable effect, as in instances in which they sit in 
valleys with their summits entirely below the tops of the rock 
walls enclosing them. Again they are found perched on steep 
rock slopes so that the siimmit of one is below the base of its 
immediate neighboi". 
Another feature as regards their distribution has so far attracte<l 
little attention. When in groups of two, three, or more, and also 
in the large irregular masses, there is a decided tendency to a 
])arallel relation between the lines connecting the centers of the 
members of the smaller groups, the lines forming the longer axes 
of the irregular masses, and the front of the ice-sheet now rep- 
resented by the terminal moraines. This ai-rangement suggests at a 
glance the theory held by several prominent geologists tliat drumlins 
are formed from a terminal moraine eroded and sculptured into their 
])resent forms by the later advance of the ice-sheet. A very 
strong argument against this view, however, is the difference in 
texture between the varying composition of terminal moraines and 
their generally loose structure and the very compact texture and 
homogeneous composition of the till in drumlins. 
The theory now advanced by Mr. Upham may, very probably, 
account for the origin of a portion of these accumulations, but 
serious objections arise against its universal application. Profes- 
tsor Davis has already stated most of these. Especially strong is 
the argument of the extremely- local origin of the till in drumlin.s 
To the objections offered by Professor Davis I will add but one. 
During the melting of the ice-sheet sufficient to accumulate the 
former englacial till into a thick superglacial stratum, lines of 
