174 A, Guyot on the Appalachian Mountain System. 
which border it. I have already said that the interior border of 
the Atlantic on rises gradually from 50 to 1200 feet, from 
New Jersey to the upper region of the Catawba, near Morganton. 
The grade of the railroads ; gives us in the Great valley a series 
of significant points: 
The Great valley * Sige ce. on the Delaware in Penn., 165 ft. 
ar the Schuylkill, Penn. 250. “ 
Toe ee at Pabaty. on the Susquehanna 328 * 
. = * at Chambersburg, Pen 600 “ 
s 2 “ near Staunton, south fork of Shenandoah, in 
entral Virgi nia, 1261 ® 
SO fo ie eth ‘Sale, in the upper valley - the Roa- i i 
1014 | 
oe . Hevten | in the valley of New Ri iver, 2065 “ 
” “4 “Mt. Airy Ridge, Ham point near the sources : 
of the Holsto 2595 “ 
. i “« — Abingdon, in Ress herk Virginia, 2071 % 
lie cece « — Bristol, on 2. = eer of Tennessee, 1678 “ | 
oe Greenville, Te 1581 “ : 
“ ac “ Knox ville a 898 “ ; 
ar ee haRance _ 675 “ 
The principal chain along the eastern border of the Great 
valley under the name of Blue Ridge, Iron, Smoky and Unaka 
Mountains, presents in the same manner an increasing altitude. 
Blue Ridge in New Jersey about 1000 to - - 1500 feet. 
_ Peaks of Otter in Virginia, the highest - 3993 “ 
igen hed on i. bou ae of Virginia, North Carolina, 
5530 
_ Bald Molin Jeu a the Black ‘A uietatine 
Smo ome, Clingman’s Mountain, gulminating ag in 
chain of the Smoky — 6660 
Thunderhead, in Smoky Moun 5520 
Great Bald, highest peak, in Smoky Mountains, near the 
Tennessee Ri 47 
angover, highest peak of the Unaka AMbéninias about 5600 
Great Frog Mountain in onset hi cs ves near mae 
south end of the Sys a gy 2 42 
south they mee 
* J am indebted to Prof. Jas. M. Safford, State Geologist of ee for 9 state 
ment of the altitu des on the railroads through this State. 
