Geology and Natural History. 469 
this seems to be the opinion which Dr. Newberry presents in his 
chapter on the less, pages 36-3 
Dr. N euler 3 follows the announcement of his conclusions by 
an account of his observations on Drift deposits of Ohio, the 
old deserted and buried river eas of the State and elsewhere, 
the heights and asp nine of the lake ridges, and on other topics 
of interest. The more ieee lake ridges south of Lake Teri 
as shown on oan the “ North ridge,” nearest the lake, 
99 to 105 feet in hedght above the lake; the “ Center ridge,” 148 
to 162 feet ; and the uth ridge,” 200 to 205 feet. Others also 
are named: the “Coe “i ” which may be identical with the last, 
180 to 200 feet; the “ Sugar ridge,” 165 to 167 feet; the “ Chest- 
nut ridge,” 189 to 191 feet. How far the different levels of these 
lake-ridges are due to differences, existing before the elevation, in 
the level of the high-water flats along the lake-borders, and to 
the existence of other mud or sand flats under water at a 
and after an elevation, they would exist as terrace plains and be 
of different heights because retaining their former differences of 
level. 
fi the remarks on the origin of the cold of the Glacial period, 
Dr. Newberry gives his objections to the theory of Lyell, and 
States, in the course of hisremarks, that this theory is sthat advoe ated 
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ewberry has labored long and zealously among the 
Quaternary deposits of Ohio and the adjoining States, and his 
— on the subject is one ahins may be studied with = 
oe get of Dr. Dawson, a sone related to the Taine 
—Dr. Dawson’s view that the Prototavites Logani of the Dev 
ian of Gaspé, — be regarded as a sea-weed, a surge 
ruthers, appears to be sufficiently ciara of the 
ical Journal ” for yon seh 1873) that “ the mo oce el 
sufficient” to convince any practical calnknkobonin = an lait 
_— - ~ a sea-weed. Its large dimensions, one specimen found 
at Gaspé Bay being three feet in diameter ; its cindeaes forth 
pov lateral branches, — gnarled roots; its occurrence with 
land "plants in beds where there are no and 
which must have been a posited in water too shallow to render 
marine organisms, an 
sh 
* For a figure, see Dana’s Manual of Geology, 1874, page 258. 
