low enough to have afforded a shallower passage-way, and one 
: e Quinnipiac 
feet above mean tide, there being a fall of nearly forty feet 
from Southington ; while the head of Mill River in Cheshire, 
The map of the Connecticut River region, in vol. xxiii, Plate 2 
(1882), shows the country and its streams from Northampton 
along the Farmington Valley and the Quinnipiac and Mill Rivers 
to New Haven. For the convenience of the reader, the map of 
the two regions which was published in the paper of 1876 is re- 
produced as Plate 5 in this volume. 
In order to complete a profile of the flood, it became neces- 
sary to make new measurements, and also to settle the rival 
claims of the two streams, the Mill and the Quinnipiac. Un- 
expectedly little Mill River was proved to have taken all the 
waters of the Farmington valley when the flood was at its 
This fact was proved by (1) the continuation of the high ter- 
race of the Southington region over the Cheshire region, along 
Mill River as well as the Quinnipiac, in spite of the lower 
position and offers of drainage of the Quinnipiac water-way ; 
(2) the high water level (164 feet) indicated on the Mill River 
valley south of Cheshire at the Mount Carmel gap; (8) the 
cobble-stone coarseness of a large part of the stratified valley 
deposits from Southington southward over the Cheshire region 
and thence all the way down Mill River valley to New Haven 
ay; and then, in contrast with these evidences of high and 
violent flood along the Mill River route, (4) the very low ter- 
race on the Quinnipiac, as it enters the Meriden valley above 
Hanover Pond, and (5) the generally sandy nature of the ter- 
race deposits in this part and to the southward along through 
Wallingford where the sands make barren sand-fields, and be- 
yond to New Haven Bay. 
It is plain that the Quinnipiac channel was closed by a dam, 
probably an ice-dam. The river now leaves the Farmington 
valley by a gorge that goes eastward through high sandstone 
hills, and after more than a mile in the gorge or cafion enters 
the Meriden valley. The gorge was easy of obstruction by 
