The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . of outline in any single region isvery 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-D6meover the extinct volcanoes of Auvergne. Moreover, the con-trol that drumlins exercise over the laying out of roads andthe division of prop
The ice age in North America and its bearing upon the antiquity of man5th edwith many new maps and illus., enland rewritten to incorporate the facts that bring it up to date, with chapters on Lake Agassiz and the Probable cause of glaciation . of outline in any single region isvery 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-D6meover the extinct volcanoes of Auvergne. Moreover, the con-trol that drumlins exercise over the laying out of roads andthe division of property is so complete in districts where theyabound, that it is the rule to find roads, fields, gardens, andeven houses oriented in obedience to the march of the old ice-invasion. About Bos-ton there are hundredsof dwellings whosewalls thus stand inclose iDarallelism withthe glacial scratcheson bed-rock beneaththemi. *. Besides the groupsof drumlins so prom-inent in the vicinityof Boston, there aretwo or three othersdeserving of mention,and which may per-haps be brought in-to connection One of these,about eight miles wideand twenty long, andcontaining thirty or forty well-marked individual hills of thecharacter described, follows the coast from Beverly to New-buryport. Parallel to this there is a belt of country, about Pig. 89.—Drnmlirs in northeastern Massachusetts.(Davis.) * American Journal of Science, vol. cxxviii, 1884, p. 409-t See map, p, 338. DRUMLmS. 285 four miles wide, over which scarcely any of these hills arefound. Still farther inland, a longer range can easily betraced. Beginning in the vicinity of Portsmouth, JN, II., thisinterior series is well developed, in a southwest direction,through Rockingham county to Amesbury, Mass. Thence,on, it completely covers the townships in Essex county oneither side of the Merrimack River to Lowell, and continues,svith little interruption
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