114 JOHN LYON RICH 



that of the principal ice-movement. Later C. H. Hitchcock/ Pack- 

 ard,^ and Vose^ brought forward further evidence of the same nature. 

 Dana/ in view of the results of his study in the Connecticut valley, 

 attributes most of these so-called evidences of local glaciation to the 

 work of valley tongues from the margin of a waning ice-sheet. In a 

 later paper^ he suggests the probability of local glaciers having 

 remained in the White Mountains after the ice-sheet had withdrawn. 

 Agassiz,^ having found a terminal moraine containing bowlders trans- 

 ported northward from their parent ledges on Mount Washington, was 

 the first to show definitely that glaciers had moved out from the White 

 Mountains in a direction opposite to that of the general ice-movement. 

 C. H. Hitchcock^ has repeatedly called attention to evidences of valley 

 glaciation among the mountains of New England, and in his later 

 papers^ suggests that ice from the higher mountains, in the form of a 

 local ice-cap, pushed outward in every direction, reaching as far north 

 as Canada. Tarr^ has shown that local valley glaciers existed on Mount 

 Katadn, Maine, and suggests that further study of that region is likely 

 to show that valley glaciers descended from several of the mountains 

 in the vicinity. Upham" beheves that "at the close of the glacial 

 period, the Adirondacks, the Green and White Mountains, with prob- 

 ably the greater part of Maine, continued ice-covered after the glacial 

 blockade was melted through along the Hudson, Champlain, and St. 



^Proceedings of the American Association for the Advancement of Science, Vol. 

 XIII (1859), pp. 329-35. 



^ American Jour7ial of Science, Vol. XLIII (1867), p. 42; American Naturalist, 

 Vol. I (1868), pp. 260-69. 



s American Naturalist, Vol. II (1868), pp. 281-91. 



* American Journal of Science,- Series 3, Vol. II (1871), pp. 233-43. 



5 Ibid., Vol. V (1874), pp. 198-21 1. 



(•Proceedings of the American Association for the Advancement of Science, Vol. X 

 (1870), pp. 161-69. 



T Geology of New Hampshire, Vol. I (1874), pp. 539-44; ibid.. Vol. Ill (1878), 

 pp. 181-340; Proceedings of the American Association for the Advancement of Science, 

 Vol. XXIV, Part II (1875), pp. 92-96; Report of the Vermont State Geologist, 1903-4, 

 pp. 67-85. 



^Journal of Geology, Vol. IV (1896), p. 60; Bulletin of the Geological Society of 

 America, Vol. VII (1896), pp. 3, 4. 



"i Bulletin of the Geological Society of America, Vol. XI (1900), pp. 433-48. 

 ^° American Geologist, Vol. XXI (1898), pp. 169, 170, 380; American Journal of 

 Science, Series 3, Vol. XLIX (1895), pp. i-x8; Twenty-third Annual Report of the 

 Geological Survey of Minnesota, 1894. 



