424 J. D. Dana—Depression of Southern New England 
Springtield and Hartford, a distance of 24 miles. The whole 
width of the waters at Springfield was probably greater than at 
Hartford, although averaging much ge the height of the 
terrace near the river shows—in depth. The Springfield level 
extended 10 miles to Holyoke, where are the South Hadley 
a of 60 feet.* 
he evidence as to the reality of this height and of the great 
breadth of the waters is as follows: 
Three-and-a-half miles north of Middletown, east of the 
river, a broad terrace rises boldly from the river to a height 
above flood-level of 144 eae and the wide plain er bel 
for the most of the way, is on the terrace. In addition to 
its level features, there is other proof that the formation be- 
neath is the true stratified drift in its consisting, as shown 
in sections, of stratified sands and gra avel. A terrace at very 
earth and sas 
Prof. Hitchcock, in his “ Surface Geology,” ee the height 
of the South Glastenbury “terraces” as 175 feet above the 
river, which would be about 152 feet above flood chee ai 
In the city of Middletown, the corresponding terrace is dis 
‘uy — 32 ie out of the iit of descent between Springfield and Hartford © 
made al ong - Enfield Falls, begi 8 miles below Springfield and continuing 
5 miles over ar bottom. mut 
The height of the Holyoke dam at gms end is 97°60 feet above low-wate: 
at Hartford, or mean low water in the Win dsor 
The tide up the Connecticut River Sages paces etimes noticeable as far as 
i F 
at the lower limit of Enfield 10 miles north of Hartford. 
in summer miles from the mouth of the river, ia a range of pats 
10 inches; and that Middiahown, of 1-93 feet.—Gen. T.G. Reports 
: A > Mr. G e 
wing persons connected with ie Eneffield Scent School 
_ a * in the Mineralogical department, and H. A. Miller, H. Hum, wi 
ore 
Prof. Hitchcock suggests in “Surface Geolo; oy. that the terrace sf ta 
Hadley of “292 feet” above stor ocean, and that at Willimantic of 
: y, and corresponds with that of “ 200 “feet” at Springfield and pr ‘tal 
Meadow (136 feet babes the river), that of East Windsor of “96 feet,” , and fu 
of Hartford of “61 feet” above the ocean. Such a slope is impons 
ther, the wi sale casaeotks: torres which he here leaves out of co 
Fe 1 eee Deen's feat: 
