284 



THE ICE AGE IN NORTH AMEBIC A. 



To this may be added the following interesting remarks 

 by Professor William M. Davis : 



The general uniformity of outline in any single region is 

 very noticeable ; indeed, the view from the summit of a com- 

 manding drumlin, in the center of a group, shows as character- 

 istic a landscape as that seen in looking from the Puy-de-D6me 

 over the extinct volcanoes of Auvergne. Moreover, the con- 

 trol that drumlins exercise over the laying out of roads and 

 the division of property is so complete in districts where they 

 abound, that it is the rule to find roads, fields, gardens, and 

 even houses oriented in obedience to the march of the old ice- 

 invasion. About Bos- 

 ton there are hundreds 

 of dwellings whose 

 walls thus stand in 

 close parallelism with 

 the glacial scratches 

 on bed-rock beneath 

 them. * 



Besides the groups 

 of drumlins so prom- 

 inent in the vicinity 

 of Boston, there are 

 two or three others 

 deserving of mention, 

 and which may per- 

 haps be brought in. 

 to connection with 

 them.f One of these, 

 about eight miles wide 

 and twenty long, and 

 containing thirty or forty well-marked individual hills of the 

 character described, follows the coast from Beverly to New- 

 buryport. Parallel to this there is a belt of country, about 



Fig. 89. — Drumlins in northeastern Massachusetts. 

 (Davis.) 



* "American Journal of Science," vol. cxxviii, 1884, p. 409. 

 f See map, p, 338. 



