from the melting of the Quaternary Glacier. 197 
lations to the sea-level that we find indicated along the sea- 
asts. 
Tt being thus altogether probable that the inéerior of the 
country participated in the change, the amount of this change 
along any diameter would probably have had some relation to 
the amount at its extremities. As Montreal and Lake Cham- 
plain lie on the west side of the area, Murray Bay on the north, 
and the Atlantic border deposits on the eastern, several such 
~ gp ay may be run across. From the ee observed 
Distance 2. 
New Haven to Montreal .._..-.--- 300 miles. 1°66. feet per mile. 
Point Shirley to Montreal ._.._---- 255). 1°65-1°75 we 
Lewiston, Me., to Montreal 195 15 
B. Lines TO Murray Bay. 
New Haven to iene cv Catiada 460 miles, 1°25 feet per mile. 
Point Shirley to Murray Bay -.--.- STB 23 i 1°33-1°40 s 
Wwiston to BAe ae aie eas 200; 1." 1:44 
©. LINES TO LOCALITIES ON THE ATLANTIC BORDER. 
New London to Lewiston, Me.---. - 220 miles. 0-9 feet per mile. 
Sankaty Head to i eg i ae ee 192.234 1°05 & 
Point Shirley to Lewi ston, Me.._..- bap 1 to 1:2 ee 
Sankaty Head to Point Shirley Sede ta 0'5 to 0°8 “ 
The mean rate of increase toward Montreal is thus 1°5 to 
175 feet per mile, while on the coast it is not over one foot a 
mile; and in the direction of an intermediate point, Murray 
Bay, it is 1:25-1:40 feet per mile. The direction of greatest 
merease is not in the direction of a meridian, but along a line 
running northwestward. 
rom these mean rates of increase, supposing the increase 
uniform, the amount of change at intermediate points on the 
lines may be obtained. We thus obtain for the region of the: 
Connecticut Valley at Lancaster, using the line from Lewiston 
to Montreal, a height of 318 feet. Using thel ine from 
aven to Murray Bay for a similar acne the height 
for the same place is Longue to be 326 feet. This near coinci- 
dence seems to be si 
For Haverhill, she amount of change would be—the place 
being 46 miles from Lan ter, Leathe along the valley, and 
198 from Long Island Sonnd 972 fe 
