430 J. D. Dana—Depression of Southern New England 
declined southward, precisely as in the Housatonic and Con- 
necticut River valleys. The heights are as follows :* 
Highest part of Norwich Plain, --...-.-- 2-22-22... 110 feet. 
1 m. th, on Norwith Plain. 2.5 .22--- 2. Y. 1012} 
t Thamesville, below the Narrows,. 88 
5¢m. “ near Mohegan R.R. Station,....-.. 75 
8 m “ 4m. W. of Montville R. R. Station, 61 “ 
10}m. “ inSmith’s cove, 250 yds. W.of R.R., 50 “ 
133m. “ at New London, northeastern part,.24-25 “ 
14tol6m. “ between New London and the Lighthouse, none 
distinct. 
“ 
““ 
In passing the Narrows to Thamesyville the Geet be 
mi 
ew 
there 35 feet instead of 25 feet. The terrace is equally low on 
the east side of the Thames in Groton ; but it is also very Dar 
row there, little room existing at the base of the hills fora 
let averaging over half a mile in width was not wide enough 
to discharge the waters coming from the hills and valleys 
within a range of forty miles. 
Ad ops aoe i the Montville Station, I am indebted to 
ee by Mr. C. P. linia, Bairseyoc of Gan ley cf ew Lieu 
