502. J. D. Dana—The overflows of the flooded Connecticut. 
ley have been long appreciated. So early as 1822 it was 
selected as the route for a canal from New Haven to Northamp- 
ton, to be named the Farmington canal, which by 1885 was fin- 
ished; and in 1847 the route of the unprofitable canal was 
than the more eastern; and in his ‘Surface Geology” he de- 
scribes that section from Northampton to New Haven as a 
branch of his “ second basin” of the Connecticut valley. 
of the ‘topogra hical basins into which the Connecticut Mey: 
may be divided (p. 11): “The second basin extends from Hol 
* The survey for the Canal found the greatest height two miles north of West- 
tween Wi and Northampton, and made the height of the top of the 
divide above the level at Northampton, 86 feet, and th 
the Connecticut Ri 8 feet; and 86+48=— 
+ Dr. Percival, in his Repo 
fact that the trap ridges of the Triassic area are often made up of two or more 
the height of the latter above 
trap-ridges are not uncommon. The associated sandstone, while generally hard- a 
baked, is imes cracked into small chips as a consequence apparently of 
