Trumbull and Gray — Helianihus tuberosus. 347 



almost horizontal but in a shallow synclinal, constitute the larger 

 part of the height, and overlie about 300 feet of limestone hi 

 the Bennington Mountain, -Mt. Anthony (fig. 12), 2,688 feet hi_Ii, 

 the Knliau limestone makes the base, and over it are about k - l,8i>0 

 feet <»f -hales and schists," dipping westward on the east side, and 

 slightly eastward on the west side. In Graylock (fig. 13), having 





Mt. Anthony, Bennington. Graylock. 



a height of 3,505 feet, the structure is like that of the 

 just described. The section of the mountain here given, . ••]>ic<l 

 from the Vermont Report, is that published by Prof. Emmons. 

 My own observations in the region, undertaken under the nl.-a 

 that Prof. Emmons's view was wrong, ended in proving him right. 

 Over 2,000 feet of slates overlie the limestone. 



Again, the occurrence of isolated north-and-south belts or 

 ledges' of Jinn- n within rh* givat centra -^ r > >elt "— as foi 

 example, those of West Kutland/lra, Castleton, Hubbardton, Sud- 

 bury— suggests, first, that the slate where broadest is not one 

 synclinal, but one with several subordinate antielinals and smi- 

 raa brought up to the 

 surface from beneath by means of the antielinals. 



It remains to give an account of the fossils and - 

 of the limestone and quartzvte of Xorth Middh bury and New 

 Haven; of the eastern belt of quartzyte and the bordering 

 limestone; and of the °reat faull wes } , of 



iry • and to present the general conclusion deduced by 

 Mr. Wing from his observations. 



(To be continued.) 



ART. XXXIX.— Notes on the History of Helianihus tuberosus, the 



so-called Jerusalem Artichoke; by J- HAMMOND TRUMBULL 



and Asa Gray. 



Under this heading the Botanical Editor of the Journal 

 Proposes to offer a few explanatory 



the subjoined letter which he received from Mr. Trumbull in 

 answer to a recent enquiry- ,, ,• a 



Warns, in the Species Plantarum, gave to Helianihus 



"his earlier Hortus 

 MiffortianuTthe h 3 "Canada." M. Alphonse 



■habitat 



