Bibliography. 371 
At Worcester he saw the plumbaginous anthracite and mica schist 
and clay slates, and then paid a visit to Prof. (now Pres.) Hitchcock at 
Amherst, in company with whom he saw some diluyial phenomena 
near Amherst, and at Smith’s Ferry near Northampton, they examined 
the red shales of the Connecticut, containing beautiful examples of fos- 
sil footprints; they ascend Mount Holyoke, and thence passed again 
to Boston, from which he made an excursion to the tertiary strata of 
Martha’s Vineyard, and at Gay Head he collected the head of a fossil 
walrus and several cetacean vertebree, sharks’ teeth, a tooth of a fossil 
seal, casts of shells, &&c: also kidney shaped masses one or two inches 
in diameter, which on analysis by Mr. Middleton proved to be copro- 
lites, and contained over 50 per cent. of phosphate of lime. He con- 
siders these strata as belonging to beds decidedly newer than the eocene, 
to which they have been referred. April 25th, he returned to Boston 
and attended the third annual meeting of the Association of American 
Geologists, &c., of which he makes honorable mention, and after its 
close he set out on a tour for the valley of the Ohio, and the country 
_west of the Alleghany Mountains, via Philadelphia and the national 
road from Cumberland in Maryland, stopping at Frostburgh long enough 
to examine the interesting coal and iron regions so finely developed 
there, in company with Capt. Green and other gentlemen, residents of 
that place. He no sooner entered the great hydrographical basin of the 
Ohio, than he was astonished at the richness and extent of the coal 
seams developed there, and which he saw finely exposed at Browns- 
ville'and Pittsburg. At Marietta, Dr. Hildreth conducted him to some 
of the interesting earthworks of the aborigines, as well as some of the 
uppermost beds of the’coal measures, which he saw again at Pomeroy on 
his way to Cincinnati, where in company with Dr. John Locke he reas- 
cended the Ohio a hundred miles to see the rocks corresponding with the 
old red sandstone, and for this purpose went on shore at Rockville, where 
the equivalent of the Waverly sandstone of New York is seen, but greatly 
diminished in volume. While at Cincinnati he saw the excellent cabi- 
nets of Messrs. Buchanan, Anthony and Clarke, and then examined the 
quarries of blue limestone about the city from which their most valuable 
Specimens were obtained. Mr. Buchanan and Mr. J. G. Anthony were 
is guides on an excursion to Big Bone Lick in Kentucky, about thirty 
three. miles from Cincinnati, so celebrated for the bones of the mas- 
todon as well as of many other extinct quadrupeds. 
The alluvial banks and the origin of the natural drift of Ohio en- 
gaged his particular attention. From Cincinnati he crossed the state 
of Ohio to Cleveland on Lake Erie, where Dr. Kirtland took him to 
Rockport and the Rocky River to see the “ lake ridges,” similar to the 
“ridge road” of Lake Ontario—visiting Fredonia, celebrated for its 
